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31304323001 = 731231162423
BaseRepresentation
bin11101001001111000…
…100000111110111001
32222210122121101011102
4131021320200332321
51003102401314001
622214144141145
72155515232550
oct351170407671
988718541142
1031304323001
1112304524226
1260979077b5
132c4b684963
14172d772d97
15c333bee6b
hex749e20fb9

31304323001 has 16 divisors (see below), whose sum is σ = 36947017728. Its totient is φ = 25955067600.

The previous prime is 31304322901. The next prime is 31304323013. The reversal of 31304323001 is 10032340313.

It is not a de Polignac number, because 31304323001 - 226 = 31237214137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31304323081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 470276 + ... + 532698.

It is an arithmetic number, because the mean of its divisors is an integer number (2309188608).

Almost surely, 231304323001 is an apocalyptic number.

31304323001 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31304323001 is a deficient number, since it is larger than the sum of its proper divisors (5642694727).

31304323001 is a wasteful number, since it uses less digits than its factorization.

31304323001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64772.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31304323001 its reverse (10032340313), we get a palindrome (41336663314).

The spelling of 31304323001 in words is "thirty-one billion, three hundred four million, three hundred twenty-three thousand, one".

Divisors: 1 7 31 217 2311 16177 62423 71641 436961 501487 1935113 13545791 144259553 1009816871 4472046143 31304323001