57953521 has 2 divisors, whose sum is σ = 57953522. Its totient is φ = 57953520.

The previous prime is 57953503. The next prime is 57953549. The reversal of 57953521 is 12535975.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 6630625 = 7164^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 57953521 - 2⁷ = 57953393 is a prime.

It is a super-2 number, since 2×57953521² = 6717221192594882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57953321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28976760 + 28976761.

It is an arithmetic number, because the mean of its divisors is an integer number (28976761).

Almost surely, 2^57953521 is an apocalyptic number.

It is an amenable number.

57953521 is a deficient number, since it is larger than the sum of its proper divisors (1).

57953521 is an equidigital number, since it uses as much as digits as its factorization.

57953521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47250, while the sum is 37.

The square root of 57953521 is about 7612.7209984341. The cubic root of 57953521 is about 386.9842373066.

It can be divided in two parts, 5795 and 3521, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 57953521 in words is "fifty-seven million, nine hundred fifty-three thousand, five hundred twenty-one".