52931561 has 2 divisors, whose sum is σ = 52931562. Its totient is φ = 52931560.

The previous prime is 52931443. The next prime is 52931563. The reversal of 52931561 is 16513925.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 9120400 = 6619^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 52931561 - 2²² = 48737257 is a prime.

Together with 52931563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52931563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26465780 + 26465781.

It is an arithmetic number, because the mean of its divisors is an integer number (26465781).

Almost surely, 2^52931561 is an apocalyptic number.

It is an amenable number.

52931561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52931561 is an equidigital number, since it uses as much as digits as its factorization.

52931561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 52931561 is about 7275.4079610699. The cubic root of 52931561 is about 375.4668224821.

The spelling of 52931561 in words is "fifty-two million, nine hundred thirty-one thousand, five hundred sixty-one".