31489925121 has 16 divisors (see below), whose sum is σ = 46682037120. Its totient is φ = 20979650160.

The previous prime is 31489925107. The next prime is 31489925149. The reversal of 31489925121 is 12152998413.

31489925121 is a `hidden beast` number, since 3 + 1 + 48 + 9 + 92 + 512 + 1 = 666.

It is not a de Polignac number, because 31489925121 - 2³⁰ = 30416183297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31489825121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336270 + ... + 419591.

It is an arithmetic number, because the mean of its divisors is an integer number (2917627320).

Almost surely, 2^31489925121 is an apocalyptic number.

It is an amenable number.

31489925121 is a deficient number, since it is larger than the sum of its proper divisors (15192111999).

31489925121 is a wasteful number, since it uses less digits than its factorization.

31489925121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757413 (or 757407 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 31489925121 in words is "thirty-one billion, four hundred eighty-nine million, nine hundred twenty-five thousand, one hundred twenty-one".