57533881 has 4 divisors (see below), whose sum is σ = 60562000. Its totient is φ = 54505764.

The previous prime is 57533873. The next prime is 57533887. The reversal of 57533881 is 18833575.

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 57533881 - 2³ = 57533873 is a prime.

It is a super-2 number, since 2×57533881² = 6620294925844322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57533887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514031 + ... + 1514068.

It is an arithmetic number, because the mean of its divisors is an integer number (15140500).

Almost surely, 2^57533881 is an apocalyptic number.

It is an amenable number.

57533881 is a deficient number, since it is larger than the sum of its proper divisors (3028119).

57533881 is a wasteful number, since it uses less digits than its factorization.

57533881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028118.

The product of its digits is 100800, while the sum is 40.

The square root of 57533881 is about 7585.1091620358. The cubic root of 57533881 is about 386.0479259848.

The spelling of 57533881 in words is "fifty-seven million, five hundred thirty-three thousand, eight hundred eighty-one".