31265130 has 32 divisors (see below), whose sum is σ = 80809344. Its totient is φ = 7695936.

The previous prime is 31265107. The next prime is 31265147. The reversal of 31265130 is 3156213.

It is a junction number, because it is equal to n+sod(n) for n = 31265097 and 31265106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39694 + ... + 40473.

It is an arithmetic number, because the mean of its divisors is an integer number (2525292).

Almost surely, 2^31265130 is an apocalyptic number.

31265130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31265130 is an abundant number, since it is smaller than the sum of its proper divisors (49544214).

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

31265130 is a wasteful number, since it uses less digits than its factorization.

31265130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80190.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 31265130 is about 5591.5230483295. The cubic root of 31265130 is about 315.0310878867.

It can be divided in two parts, 3126 and 5130, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 31265130 in words is "thirty-one million, two hundred sixty-five thousand, one hundred thirty".