31393739425 has 48 divisors (see below), whose sum is σ = 42161517760. Its totient is φ = 23115248640.

The previous prime is 31393739413. The next prime is 31393739437. The reversal of 31393739425 is 52493739313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31393739413) and next prime (31393739437).

It is not a de Polignac number, because 31393739425 - 2¹³ = 31393731233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2316469 + ... + 2329981.

Almost surely, 2^31393739425 is an apocalyptic number.

It is an amenable number.

31393739425 is a deficient number, since it is larger than the sum of its proper divisors (10767778335).

31393739425 is a wasteful number, since it uses less digits than its factorization.

31393739425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13682 (or 13677 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 49.

The spelling of 31393739425 in words is "thirty-one billion, three hundred ninety-three million, seven hundred thirty-nine thousand, four hundred twenty-five".