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23031143304 = 2331385386539
BaseRepresentation
bin10101011100110000…
…110101101110001000
32012110002011022011120
4111130300311232020
5334131433041204
614325205155240
71443506326251
oct253460655610
965402138146
1023031143304
119849530934
1245690bbb20
132230674660
141186ab7b28
158ebe126d9
hex55cc35b88

23031143304 has 64 divisors (see below), whose sum is σ = 62080334400. Its totient is φ = 7078116096.

The previous prime is 23031143209. The next prime is 23031143309. The reversal of 23031143304 is 40334113032.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (23031143309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222867 + ... + 309405.

It is an arithmetic number, because the mean of its divisors is an integer number (970005225).

Almost surely, 223031143304 is an apocalyptic number.

23031143304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23031143304 is an abundant number, since it is smaller than the sum of its proper divisors (39049191096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23031143304 is a wasteful number, since it uses less digits than its factorization.

23031143304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87414 (or 87410 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 23031143304 its reverse (40334113032), we get a palindrome (63365256336).

The spelling of 23031143304 in words is "twenty-three billion, thirty-one million, one hundred forty-three thousand, three hundred four".

Divisors: 1 2 3 4 6 8 12 13 24 26 39 52 78 104 156 312 853 1706 2559 3412 5118 6824 10236 11089 20472 22178 33267 44356 66534 86539 88712 133068 173078 259617 266136 346156 519234 692312 1038468 1125007 2076936 2250014 3375021 4500028 6750042 9000056 13500084 27000168 73817767 147635534 221453301 295271068 442906602 590542136 885813204 959630971 1771626408 1919261942 2878892913 3838523884 5757785826 7677047768 11515571652 23031143304