57220437 has 8 divisors (see below), whose sum is σ = 76360000. Its totient is φ = 38113920.

The previous prime is 57220433. The next prime is 57220441. The reversal of 57220437 is 73402275.

It is an interprime number because it is at equal distance from previous prime (57220433) and next prime (57220441).

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

It is not a de Polignac number, because 57220437 - 2² = 57220433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57220433) 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, 3889 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (9545000).

Almost surely, 2^57220437 is an apocalyptic number.

It is an amenable number.

57220437 is a deficient number, since it is larger than the sum of its proper divisors (19139563).

57220437 is a wasteful number, since it uses less digits than its factorization.

57220437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16523.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 57220437 is about 7564.4191449179. The cubic root of 57220437 is about 385.3455872636.

The spelling of 57220437 in words is "fifty-seven million, two hundred twenty thousand, four hundred thirty-seven".