57091517 has 12 divisors (see below), whose sum is σ = 68704380. Its totient is φ = 47246976.

The previous prime is 57091499. The next prime is 57091577. The reversal of 57091517 is 71519075.

It can be written as a sum of positive squares in 2 ways, for example, as 43943641 + 13147876 = 6629^2 + 3626^2 .

It is not a de Polignac number, because 57091517 - 2¹⁰ = 57090493 is a prime.

It is a super-2 number, since 2×57091517² = 6518882626722578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57091577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18668 + ... + 21509.

It is an arithmetic number, because the mean of its divisors is an integer number (5725365).

Almost surely, 2^57091517 is an apocalyptic number.

It is an amenable number.

57091517 is a deficient number, since it is larger than the sum of its proper divisors (11612863).

57091517 is a wasteful number, since it uses less digits than its factorization.

57091517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40220 (or 40213 counting only the distinct ones).

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 57091517 is about 7555.8928658366. The cubic root of 57091517 is about 385.0559698244.

The spelling of 57091517 in words is "fifty-seven million, ninety-one thousand, five hundred seventeen".