57111621 has 8 divisors (see below), whose sum is σ = 87027264. Its totient is φ = 32635200.

The previous prime is 57111617. The next prime is 57111629. The reversal of 57111621 is 12611175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57111621 - 2² = 57111617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 57111591 and 57111600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57111629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359780 + ... + 1359821.

It is an arithmetic number, because the mean of its divisors is an integer number (10878408).

Almost surely, 2^57111621 is an apocalyptic number.

It is an amenable number.

57111621 is a deficient number, since it is larger than the sum of its proper divisors (29915643).

57111621 is a wasteful number, since it uses less digits than its factorization.

57111621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719611.

The product of its digits is 420, while the sum is 24.

The square root of 57111621 is about 7557.2231011133. The cubic root of 57111621 is about 385.1011619250.

Adding to 57111621 its reverse (12611175), we get a palindrome (69722796).

The spelling of 57111621 in words is "fifty-seven million, one hundred eleven thousand, six hundred twenty-one".