31440565425 has 24 divisors (see below), whose sum is σ = 55039486176. Its totient is φ = 15781930240.

The previous prime is 31440565363. The next prime is 31440565489. The reversal of 31440565425 is 52456504413.

It is not a de Polignac number, because 31440565425 - 2⁹ = 31440564913 is a prime.

It is a super-3 number, since 3×31440565425³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12328359 + ... + 12330908.

It is an arithmetic number, because the mean of its divisors is an integer number (2293311924).

Almost surely, 2^31440565425 is an apocalyptic number.

It is an amenable number.

31440565425 is a deficient number, since it is larger than the sum of its proper divisors (23598920751).

31440565425 is a wasteful number, since it uses less digits than its factorization.

31440565425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24659297 (or 24659292 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 31440565425 in words is "thirty-one billion, four hundred forty million, five hundred sixty-five thousand, four hundred twenty-five".