231207502621631 has 2 divisors, whose sum is σ = 231207502621632. Its totient is φ = 231207502621630.

The previous prime is 231207502621621. The next prime is 231207502621649. The reversal of 231207502621631 is 136126205702132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231207502621631 - 2⁶ = 231207502621567 is a prime.

It is a super-2 number, since 2×231207502621631² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231207502621621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115603751310815 + 115603751310816.

It is an arithmetic number, because the mean of its divisors is an integer number (115603751310816).

Almost surely, 2^{231207502621631} is an apocalyptic number.

231207502621631 is a deficient number, since it is larger than the sum of its proper divisors (1).

231207502621631 is an equidigital number, since it uses as much as digits as its factorization.

231207502621631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 231207502621631 in words is "two hundred thirty-one trillion, two hundred seven billion, five hundred two million, six hundred twenty-one thousand, six hundred thirty-one".