57123565 has 16 divisors (see below), whose sum is σ = 71647488. Its totient is φ = 43678656.

The previous prime is 57123541. The next prime is 57123569. The reversal of 57123565 is 56532175.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57123565 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57123565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57123569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7279 + ... + 12931.

It is an arithmetic number, because the mean of its divisors is an integer number (4477968).

Almost surely, 2^57123565 is an apocalyptic number.

It is an amenable number.

57123565 is a deficient number, since it is larger than the sum of its proper divisors (14523923).

57123565 is a wasteful number, since it uses less digits than its factorization.

57123565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748.

The product of its digits is 31500, while the sum is 34.

The square root of 57123565 is about 7558.0132971569. The cubic root of 57123565 is about 385.1280060102.

The spelling of 57123565 in words is "fifty-seven million, one hundred twenty-three thousand, five hundred sixty-five".