31532930 has 32 divisors (see below), whose sum is σ = 66685248. Its totient is φ = 10584000.

The previous prime is 31532923. The next prime is 31532939. The reversal of 31532930 is 3923513.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 31532930.

It is not an unprimeable number, because it can be changed into a prime (31532939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9596 + ... + 12455.

It is an arithmetic number, because the mean of its divisors is an integer number (2083914).

Almost surely, 2^31532930 is an apocalyptic number.

31532930 is an abundant number, since it is smaller than the sum of its proper divisors (35152318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31532930 is a wasteful number, since it uses less digits than its factorization.

31532930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22082.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 31532930 is about 5615.4189514229. The cubic root of 31532930 is about 315.9279932604.

The spelling of 31532930 in words is "thirty-one million, five hundred thirty-two thousand, nine hundred thirty".