31013130 has 32 divisors (see below), whose sum is σ = 78350400. Its totient is φ = 7834752.

The previous prime is 31013089. The next prime is 31013137. The reversal of 31013130 is 3131013.

It is not an unprimeable number, because it can be changed into a prime (31013137) 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, 26635 + ... + 27774.

It is an arithmetic number, because the mean of its divisors is an integer number (2448450).

Almost surely, 2^31013130 is an apocalyptic number.

31013130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31013130 is an abundant number, since it is smaller than the sum of its proper divisors (47337270).

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

31013130 is a wasteful number, since it uses less digits than its factorization.

31013130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54438.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31013130 is about 5568.9433468119. The cubic root of 31013130 is about 314.1824098693.

Adding to 31013130 its reverse (3131013), we get a palindrome (34144143).

The spelling of 31013130 in words is "thirty-one million, thirteen thousand, one hundred thirty".