31130148 has 24 divisors (see below), whose sum is σ = 83013952. Its totient is φ = 8894304.

The previous prime is 31130147. The next prime is 31130149. The reversal of 31130148 is 84103113.

It is an interprime number because it is at equal distance from previous prime (31130147) and next prime (31130149).

It is a super-2 number, since 2×31130148² = 1938172229003808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31130147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185215 + ... + 185382.

Almost surely, 2^31130148 is an apocalyptic number.

It is an amenable number.

31130148 is an abundant number, since it is smaller than the sum of its proper divisors (51883804).

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

31130148 is a wasteful number, since it uses less digits than its factorization.

31130148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370611 (or 370609 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 31130148 is about 5579.4397568215. The cubic root of 31130148 is about 314.5770690954.

The spelling of 31130148 in words is "thirty-one million, one hundred thirty thousand, one hundred forty-eight".