31148130 has 32 divisors (see below), whose sum is σ = 80506944. Its totient is φ = 7667136.

The previous prime is 31148123. The next prime is 31148137. The reversal of 31148130 is 3184113.

It is an interprime number because it is at equal distance from previous prime (31148123) and next prime (31148137).

It is a junction number, because it is equal to n+sod(n) for n = 31148097 and 31148106.

It is not an unprimeable number, because it can be changed into a prime (31148137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39544 + ... + 40323.

It is an arithmetic number, because the mean of its divisors is an integer number (2515842).

Almost surely, 2^31148130 is an apocalyptic number.

31148130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31148130 is an abundant number, since it is smaller than the sum of its proper divisors (49358814).

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

31148130 is a wasteful number, since it uses less digits than its factorization.

31148130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79890.

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

The square root of 31148130 is about 5581.0509762947. The cubic root of 31148130 is about 314.6376281396.

The spelling of 31148130 in words is "thirty-one million, one hundred forty-eight thousand, one hundred thirty".