57216017 has 4 divisors (see below), whose sum is σ = 58185840. Its totient is φ = 56246196.

The previous prime is 57216007. The next prime is 57216059. The reversal of 57216017 is 71061275.

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 57216017 - 2¹⁸ = 56953873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57216007) 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, 484823 + ... + 484940.

It is an arithmetic number, because the mean of its divisors is an integer number (14546460).

Almost surely, 2^57216017 is an apocalyptic number.

It is an amenable number.

57216017 is a deficient number, since it is larger than the sum of its proper divisors (969823).

57216017 is an equidigital number, since it uses as much as digits as its factorization.

57216017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969822.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 57216017 is about 7564.1269820119. The cubic root of 57216017 is about 385.3356649850.

The spelling of 57216017 in words is "fifty-seven million, two hundred sixteen thousand, seventeen".