57311261 has 16 divisors (see below), whose sum is σ = 68144640. Its totient is φ = 47174400.

The previous prime is 57311237. The next prime is 57311273. The reversal of 57311261 is 16211375.

It is not a de Polignac number, because 57311261 - 2²² = 53116957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57311261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57311861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19061 + ... + 21861.

It is an arithmetic number, because the mean of its divisors is an integer number (4259040).

Almost surely, 2^57311261 is an apocalyptic number.

It is an amenable number.

57311261 is a deficient number, since it is larger than the sum of its proper divisors (10833379).

57311261 is a wasteful number, since it uses less digits than its factorization.

57311261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its digits is 1260, while the sum is 26.

The square root of 57311261 is about 7570.4201336518. The cubic root of 57311261 is about 385.5493613485.

The spelling of 57311261 in words is "fifty-seven million, three hundred eleven thousand, two hundred sixty-one".