57111605 has 4 divisors (see below), whose sum is σ = 68533932. Its totient is φ = 45689280.

The previous prime is 57111589. The next prime is 57111617. The reversal of 57111605 is 50611175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30217009 + 26894596 = 5497^2 + 5186^2 .

It is not a de Polignac number, because 57111605 - 2⁴ = 57111589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5711156 + ... + 5711165.

It is an arithmetic number, because the mean of its divisors is an integer number (17133483).

Almost surely, 2^57111605 is an apocalyptic number.

It is an amenable number.

57111605 is a deficient number, since it is larger than the sum of its proper divisors (11422327).

57111605 is a wasteful number, since it uses less digits than its factorization.

57111605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11422326.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 57111605 is about 7557.2220425233. Note that the first 3 decimals coincide. The cubic root of 57111605 is about 385.1011259626.

The spelling of 57111605 in words is "fifty-seven million, one hundred eleven thousand, six hundred five".