57611 has 4 divisors (see below), whose sum is σ = 58752. Its totient is φ = 56472.

The previous prime is 57601. The next prime is 57637. The reversal of 57611 is 11675.

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

It is a cyclic number.

It is not a de Polignac number, because 57611 - 2¹⁴ = 41227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491 + ... + 596.

It is an arithmetic number, because the mean of its divisors is an integer number (14688).

2⁵⁷⁶¹¹ is an apocalyptic number.

57611 is a deficient number, since it is larger than the sum of its proper divisors (1141).

57611 is a wasteful number, since it uses less digits than its factorization.

57611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its digits is 210, while the sum is 20.

The square root of 57611 is about 240.0229155727. The cubic root of 57611 is about 38.6220336498.

It can be divided in two parts, 576 and 11, that multiplied together give a palindrome (6336).

The spelling of 57611 in words is "fifty-seven thousand, six hundred eleven".