57355261 has 4 divisors (see below), whose sum is σ = 59848992. Its totient is φ = 54861532.

The previous prime is 57355247. The next prime is 57355267. The reversal of 57355261 is 16255375.

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 not a de Polignac number, because 57355261 - 2²³ = 48966653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57355267) 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, 1246831 + ... + 1246876.

It is an arithmetic number, because the mean of its divisors is an integer number (14962248).

Almost surely, 2^57355261 is an apocalyptic number.

It is an amenable number.

57355261 is a deficient number, since it is larger than the sum of its proper divisors (2493731).

57355261 is a wasteful number, since it uses less digits than its factorization.

57355261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493730.

The product of its digits is 31500, while the sum is 34.

The square root of 57355261 is about 7573.3256235289. The cubic root of 57355261 is about 385.6480030006.

The spelling of 57355261 in words is "fifty-seven million, three hundred fifty-five thousand, two hundred sixty-one".