561971312 has 40 divisors (see below), whose sum is σ = 1317567456. Its totient is φ = 226676736.

The previous prime is 561971287. The next prime is 561971321. The reversal of 561971312 is 213179165.

It is a super-2 number, since 2×561971312² = 631623511022002688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145673 + ... + 149480.

Almost surely, 2^561971312 is an apocalyptic number.

It is an amenable number.

561971312 is an abundant number, since it is smaller than the sum of its proper divisors (755596144).

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

561971312 is a wasteful number, since it uses less digits than its factorization.

561971312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295185 (or 295179 counting only the distinct ones).

The product of its digits is 11340, while the sum is 35.

The square root of 561971312 is about 23705.9341094166. The cubic root of 561971312 is about 825.2231105173.

The spelling of 561971312 in words is "five hundred sixty-one million, nine hundred seventy-one thousand, three hundred twelve".