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23201212230 = 23257173758549
BaseRepresentation
bin10101100110111001…
…100110011101000110
32012212221011200212200
4111212321212131012
5340004002242410
614354122255330
71450643023110
oct254671463506
965787150780
1023201212230
119926530169
1245b6057546
13225997c161
1411a15083b0
1590bd083c0
hex566e66746

23201212230 has 192 divisors, whose sum is σ = 74970230400. Its totient is φ = 4856205312.

The previous prime is 23201212219. The next prime is 23201212259. The reversal of 23201212230 is 3221210232.

23201212230 is a `hidden beast` number, since 2 + 320 + 121 + 223 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 366996 + ... + 425544.

It is an arithmetic number, because the mean of its divisors is an integer number (390469950).

Almost surely, 223201212230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23201212230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37485115200).

23201212230 is an abundant number, since it is smaller than the sum of its proper divisors (51769018170).

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

23201212230 is a wasteful number, since it uses less digits than its factorization.

23201212230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58623 (or 58620 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23201212230 its reverse (3221210232), we get a palindrome (26422422462).

The spelling of 23201212230 in words is "twenty-three billion, two hundred one million, two hundred twelve thousand, two hundred thirty".