57257761 has 4 divisors (see below), whose sum is σ = 62463024. Its totient is φ = 52052500.

The previous prime is 57257749. The next prime is 57257777. The reversal of 57257761 is 16775275.

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 57257761 - 2¹¹ = 57255713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57257701) 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, 2602615 + ... + 2602636.

It is an arithmetic number, because the mean of its divisors is an integer number (15615756).

Almost surely, 2^57257761 is an apocalyptic number.

It is an amenable number.

57257761 is a deficient number, since it is larger than the sum of its proper divisors (5205263).

57257761 is a wasteful number, since it uses less digits than its factorization.

57257761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205262.

The product of its digits is 102900, while the sum is 40.

The square root of 57257761 is about 7566.8858191465. The cubic root of 57257761 is about 385.4293540283.

The spelling of 57257761 in words is "fifty-seven million, two hundred fifty-seven thousand, seven hundred sixty-one".