57357881 has 24 divisors (see below), whose sum is σ = 72595656. Its totient is φ = 44997120.

The previous prime is 57357857. The next prime is 57357887. The reversal of 57357881 is 18875375.

It can be written as a sum of positive squares in 4 ways, for example, as 8357881 + 49000000 = 2891^2 + 7000^2 .

It is not a de Polignac number, because 57357881 - 2¹⁸ = 57095737 is a prime.

It is a super-2 number, since 2×57357881² = 6579853025620322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57357887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29891 + ... + 31751.

It is an arithmetic number, because the mean of its divisors is an integer number (3024819).

Almost surely, 2^57357881 is an apocalyptic number.

It is an amenable number.

57357881 is a deficient number, since it is larger than the sum of its proper divisors (15237775).

57357881 is a wasteful number, since it uses less digits than its factorization.

57357881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1922 counting only the distinct ones).

The product of its digits is 235200, while the sum is 44.

The square root of 57357881 is about 7573.4985970818. The cubic root of 57357881 is about 385.6538750709.

The spelling of 57357881 in words is "fifty-seven million, three hundred fifty-seven thousand, eight hundred eighty-one".