53631257 has 2 divisors, whose sum is σ = 53631258. Its totient is φ = 53631256.

The previous prime is 53631251. The next prime is 53631287. The reversal of 53631257 is 75213635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 2637376 = 7141^2 + 1624^2 .

It is a cyclic number.

It is not a de Polignac number, because 53631257 - 2²⁰ = 52582681 is a prime.

It is not a weakly prime, because it can be changed into another prime (53631251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26815628 + 26815629.

It is an arithmetic number, because the mean of its divisors is an integer number (26815629).

Almost surely, 2^53631257 is an apocalyptic number.

It is an amenable number.

53631257 is a deficient number, since it is larger than the sum of its proper divisors (1).

53631257 is an equidigital number, since it uses as much as digits as its factorization.

53631257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 53631257 is about 7323.3364663929. The cubic root of 53631257 is about 377.1140027706.

The spelling of 53631257 in words is "fifty-three million, six hundred thirty-one thousand, two hundred fifty-seven".