31925053439 has 4 divisors (see below), whose sum is σ = 31925446320. Its totient is φ = 31924660560.

The previous prime is 31925053421. The next prime is 31925053441. The reversal of 31925053439 is 93435052913.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93435052913 = 811 ⋅115209683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31925053439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31925053439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31925053339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24227 + ... + 253844.

It is an arithmetic number, because the mean of its divisors is an integer number (7981361580).

Almost surely, 2^31925053439 is an apocalyptic number.

31925053439 is a deficient number, since it is larger than the sum of its proper divisors (392881).

31925053439 is a wasteful number, since it uses less digits than its factorization.

31925053439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392880.

The product of its (nonzero) digits is 437400, while the sum is 44.

The spelling of 31925053439 in words is "thirty-one billion, nine hundred twenty-five million, fifty-three thousand, four hundred thirty-nine".