57132381 has 8 divisors (see below), whose sum is σ = 76350240. Its totient is φ = 38001392.

The previous prime is 57132379. The next prime is 57132409. The reversal of 57132381 is 18323175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57132381 - 2¹ = 57132379 is a prime.

It is a super-2 number, since 2×57132381² = 6528217917458322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57132301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20166 + ... + 22823.

It is an arithmetic number, because the mean of its divisors is an integer number (9543780).

Almost surely, 2^57132381 is an apocalyptic number.

It is an amenable number.

57132381 is a deficient number, since it is larger than the sum of its proper divisors (19217859).

57132381 is a wasteful number, since it uses less digits than its factorization.

57132381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43435.

The product of its digits is 5040, while the sum is 30.

The square root of 57132381 is about 7558.5964967049. The cubic root of 57132381 is about 385.1478175296.

The spelling of 57132381 in words is "fifty-seven million, one hundred thirty-two thousand, three hundred eighty-one".