31103924 has 6 divisors (see below), whose sum is σ = 54431874. Its totient is φ = 15551960.

The previous prime is 31103911. The next prime is 31103929. The reversal of 31103924 is 42930113.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 12888100 = 4268^2 + 3590^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31103924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887987 + ... + 3887994.

It is an arithmetic number, because the mean of its divisors is an integer number (9071979).

Almost surely, 2^31103924 is an apocalyptic number.

It is an amenable number.

31103924 is a deficient number, since it is larger than the sum of its proper divisors (23327950).

31103924 is a wasteful number, since it uses less digits than its factorization.

31103924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775985 (or 7775983 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 31103924 is about 5577.0892049527. The cubic root of 31103924 is about 314.4887111624.

The spelling of 31103924 in words is "thirty-one million, one hundred three thousand, nine hundred twenty-four".