57509261 has 2 divisors, whose sum is σ = 57509262. Its totient is φ = 57509260.

The previous prime is 57509239. The next prime is 57509273. The reversal of 57509261 is 16290575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38316100 + 19193161 = 6190^2 + 4381^2 .

It is a cyclic number.

It is not a de Polignac number, because 57509261 - 2⁶ = 57509197 is a prime.

It is a super-2 number, since 2×57509261² = 6614630201532242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57509281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28754630 + 28754631.

It is an arithmetic number, because the mean of its divisors is an integer number (28754631).

Almost surely, 2^57509261 is an apocalyptic number.

It is an amenable number.

57509261 is a deficient number, since it is larger than the sum of its proper divisors (1).

57509261 is an equidigital number, since it uses as much as digits as its factorization.

57509261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 57509261 is about 7583.4860717219. The cubic root of 57509261 is about 385.9928520247.

The spelling of 57509261 in words is "fifty-seven million, five hundred nine thousand, two hundred sixty-one".