31631616525 has 48 divisors (see below), whose sum is σ = 57781551744. Its totient is φ = 15187476480.

The previous prime is 31631616503. The next prime is 31631616547. The reversal of 31631616525 is 52561613613.

It is an interprime number because it is at equal distance from previous prime (31631616503) and next prime (31631616547).

It is not a de Polignac number, because 31631616525 - 2¹⁰ = 31631615501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 510004 + ... + 568653.

It is an arithmetic number, because the mean of its divisors is an integer number (1203782328).

Almost surely, 2^31631616525 is an apocalyptic number.

It is an amenable number.

31631616525 is a deficient number, since it is larger than the sum of its proper divisors (26149935219).

31631616525 is a wasteful number, since it uses less digits than its factorization.

31631616525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078710 (or 1078705 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The spelling of 31631616525 in words is "thirty-one billion, six hundred thirty-one million, six hundred sixteen thousand, five hundred twenty-five".