57217897 has 4 divisors (see below), whose sum is σ = 62419536. Its totient is φ = 52016260.

The previous prime is 57217891. The next prime is 57217931. The reversal of 57217897 is 79871275.

57217897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57217897 - 2¹¹ = 57215849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57217891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600803 + ... + 2600824.

It is an arithmetic number, because the mean of its divisors is an integer number (15604884).

Almost surely, 2^57217897 is an apocalyptic number.

It is an amenable number.

57217897 is a deficient number, since it is larger than the sum of its proper divisors (5201639).

57217897 is a wasteful number, since it uses less digits than its factorization.

57217897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201638.

The product of its digits is 246960, while the sum is 46.

The square root of 57217897 is about 7564.2512517763. The cubic root of 57217897 is about 385.3398853831.

It can be divided in two parts, 572178 and 97, that added together give a palindrome (572275).

The spelling of 57217897 in words is "fifty-seven million, two hundred seventeen thousand, eight hundred ninety-seven".