57172057 has 4 divisors (see below), whose sum is σ = 57383296. Its totient is φ = 56960820.

The previous prime is 57172033. The next prime is 57172061. The reversal of 57172057 is 75027175.

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 a de Polignac number, because none of the positive numbers 2^k-57172057 is a prime.

It is a super-2 number, since 2×57172057² = 6537288203222498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57172657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105213 + ... + 105754.

It is an arithmetic number, because the mean of its divisors is an integer number (14345824).

Almost surely, 2^57172057 is an apocalyptic number.

It is an amenable number.

57172057 is a deficient number, since it is larger than the sum of its proper divisors (211239).

57172057 is a wasteful number, since it uses less digits than its factorization.

57172057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211238.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 57172057 is about 7561.2206025218. The cubic root of 57172057 is about 385.2369531392.

The spelling of 57172057 in words is "fifty-seven million, one hundred seventy-two thousand, fifty-seven".