231515010344012 has 24 divisors (see below), whose sum is σ = 428984255500416. Its totient is φ = 108948097974528.

The previous prime is 231515010343963. The next prime is 231515010344027. The reversal of 231515010344012 is 210443010515132.

It is a super-2 number, since 2×231515010344012² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231515010344012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65199653 + ... + 68658755.

It is an arithmetic number, because the mean of its divisors is an integer number (17874343979184).

Almost surely, 2^{231515010344012} is an apocalyptic number.

It is an amenable number.

231515010344012 is a deficient number, since it is larger than the sum of its proper divisors (197469245156404).

231515010344012 is a wasteful number, since it uses less digits than its factorization.

231515010344012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443377 (or 4443375 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 231515010344012 its reverse (210443010515132), we get a palindrome (441958020859144).

The spelling of 231515010344012 in words is "two hundred thirty-one trillion, five hundred fifteen billion, ten million, three hundred forty-four thousand, twelve".