57252991 has 4 divisors (see below), whose sum is σ = 60620832. Its totient is φ = 53885152.

The previous prime is 57252983. The next prime is 57253037. The reversal of 57252991 is 19925275.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57252991 - 2³ = 57252983 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57252901) 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, 1683895 + ... + 1683928.

It is an arithmetic number, because the mean of its divisors is an integer number (15155208).

Almost surely, 2^57252991 is an apocalyptic number.

57252991 is a deficient number, since it is larger than the sum of its proper divisors (3367841).

57252991 is a wasteful number, since it uses less digits than its factorization.

57252991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367840.

The product of its digits is 56700, while the sum is 40.

The square root of 57252991 is about 7566.5706234727. The cubic root of 57252991 is about 385.4186506811.

The spelling of 57252991 in words is "fifty-seven million, two hundred fifty-two thousand, nine hundred ninety-one".