52731281 has 2 divisors, whose sum is σ = 52731282. Its totient is φ = 52731280.

The previous prime is 52731277. The next prime is 52731293. The reversal of 52731281 is 18213725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 25847056 = 5185^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 52731281 - 2² = 52731277 is a prime.

It is a super-2 number, since 2×52731281² = 5561175991801922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52731271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26365640 + 26365641.

It is an arithmetic number, because the mean of its divisors is an integer number (26365641).

Almost surely, 2^52731281 is an apocalyptic number.

52731281 is the 3248-th centered decagonal number.

It is an amenable number.

52731281 is a deficient number, since it is larger than the sum of its proper divisors (1).

52731281 is an equidigital number, since it uses as much as digits as its factorization.

52731281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 52731281 is about 7261.6307397168. The cubic root of 52731281 is about 374.9926659306.

The spelling of 52731281 in words is "fifty-two million, seven hundred thirty-one thousand, two hundred eighty-one".