57672181 has 4 divisors (see below), whose sum is σ = 65911072. Its totient is φ = 49433292.

The previous prime is 57672179. The next prime is 57672191. The reversal of 57672181 is 18127675.

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 57672181 - 2¹ = 57672179 is a prime.

It is a super-2 number, since 2×57672181² = 6652160922593522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57672181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57672101) 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, 4119435 + ... + 4119448.

It is an arithmetic number, because the mean of its divisors is an integer number (16477768).

Almost surely, 2^57672181 is an apocalyptic number.

It is an amenable number.

57672181 is a deficient number, since it is larger than the sum of its proper divisors (8238891).

57672181 is an equidigital number, since it uses as much as digits as its factorization.

57672181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238890.

The product of its digits is 23520, while the sum is 37.

The square root of 57672181 is about 7594.2202364693. The cubic root of 57672181 is about 386.3570059233.

The spelling of 57672181 in words is "fifty-seven million, six hundred seventy-two thousand, one hundred eighty-one".