57109261 has 4 divisors (see below), whose sum is σ = 62301024. Its totient is φ = 51917500.

The previous prime is 57109211. The next prime is 57109267. The reversal of 57109261 is 16290175.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57109261 - 2¹⁵ = 57076493 is a prime.

It is a super-2 number, since 2×57109261² = 6522935383932242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57109267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595865 + ... + 2595886.

It is an arithmetic number, because the mean of its divisors is an integer number (15575256).

Almost surely, 2^57109261 is an apocalyptic number.

It is an amenable number.

57109261 is a deficient number, since it is larger than the sum of its proper divisors (5191763).

57109261 is a wasteful number, since it uses less digits than its factorization.

57109261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191762.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 57109261 is about 7557.0669574908. The cubic root of 57109261 is about 385.0958573930.

The spelling of 57109261 in words is "fifty-seven million, one hundred nine thousand, two hundred sixty-one".