57022387 has 4 divisors (see below), whose sum is σ = 57432760. Its totient is φ = 56612016.

The previous prime is 57022367. The next prime is 57022391. The reversal of 57022387 is 78322075.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57022387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57022337) 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, 204978 + ... + 205255.

It is an arithmetic number, because the mean of its divisors is an integer number (14358190).

Almost surely, 2^57022387 is an apocalyptic number.

57022387 is a deficient number, since it is larger than the sum of its proper divisors (410373).

57022387 is a wasteful number, since it uses less digits than its factorization.

57022387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410372.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 57022387 is about 7551.3169050173. The cubic root of 57022387 is about 384.9004903896.

The spelling of 57022387 in words is "fifty-seven million, twenty-two thousand, three hundred eighty-seven".