31630137 has 48 divisors (see below), whose sum is σ = 55332864. Its totient is φ = 15876000.

The previous prime is 31630133. The next prime is 31630139. The reversal of 31630137 is 73103613.

It is not a de Polignac number, because 31630137 - 2² = 31630133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31630133) 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 47 ways as a sum of consecutive naturals, for example, 49812 + ... + 50442.

It is an arithmetic number, because the mean of its divisors is an integer number (1152768).

Almost surely, 2^31630137 is an apocalyptic number.

It is an amenable number.

31630137 is a deficient number, since it is larger than the sum of its proper divisors (23702727).

31630137 is a wasteful number, since it uses less digits than its factorization.

31630137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 31630137 is about 5624.0676560653. The cubic root of 31630137 is about 316.2522987746.

The spelling of 31630137 in words is "thirty-one million, six hundred thirty thousand, one hundred thirty-seven".