31521161464623 has 12 divisors (see below), whose sum is σ = 45832093492848. Its totient is φ = 20874941366400.

The previous prime is 31521161464621. The next prime is 31521161464669. The reversal of 31521161464623 is 32646416112513.

31521161464623 is a `hidden beast` number, since 3 + 1 + 5 + 2 + 1 + 1 + 6 + 14 + 6 + 4 + 623 = 666.

It is not a de Polignac number, because 31521161464623 - 2¹ = 31521161464621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31521161464621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11597188290 + ... + 11597191007.

It is an arithmetic number, because the mean of its divisors is an integer number (3819341124404).

Almost surely, 2^{31521161464623} is an apocalyptic number.

31521161464623 is a deficient number, since it is larger than the sum of its proper divisors (14310932028225).

31521161464623 is a wasteful number, since it uses less digits than its factorization.

31521161464623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23194379454 (or 23194379451 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 31521161464623 in words is "thirty-one trillion, five hundred twenty-one billion, one hundred sixty-one million, four hundred sixty-four thousand, six hundred twenty-three".