31131148 has 24 divisors (see below), whose sum is σ = 58553712. Its totient is φ = 14429184.

The previous prime is 31131137. The next prime is 31131179. The reversal of 31131148 is 84113113.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1140 + ... + 7972.

It is an arithmetic number, because the mean of its divisors is an integer number (2439738).

Almost surely, 2^31131148 is an apocalyptic number.

It is an amenable number.

31131148 is a deficient number, since it is larger than the sum of its proper divisors (27422564).

31131148 is a wasteful number, since it uses less digits than its factorization.

31131148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6921 (or 6919 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 31131148 is about 5579.5293708341. The cubic root of 31131148 is about 314.5804374668.

The spelling of 31131148 in words is "thirty-one million, one hundred thirty-one thousand, one hundred forty-eight".