31136930 has 24 divisors (see below), whose sum is σ = 61607196. Its totient is φ = 11322080.

The previous prime is 31136929. The next prime is 31136939. The reversal of 31136930 is 3963113.

It can be written as a sum of positive squares in 2 ways, for example, as 27762361 + 3374569 = 5269^2 + 1837^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31136930.

It is not an unprimeable number, because it can be changed into a prime (31136939) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11657 + ... + 14076.

Almost surely, 2^31136930 is an apocalyptic number.

31136930 is a deficient number, since it is larger than the sum of its proper divisors (30470266).

31136930 is a wasteful number, since it uses less digits than its factorization.

31136930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25762 (or 25751 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 31136930 is about 5580.0474908373. The cubic root of 31136930 is about 314.5999119761.

The spelling of 31136930 in words is "thirty-one million, one hundred thirty-six thousand, nine hundred thirty".