57105813 has 8 divisors (see below), whose sum is σ = 78597376. Its totient is φ = 36842400.

The previous prime is 57105761. The next prime is 57105827. The reversal of 57105813 is 31850175.

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

It is a de Polignac number, because none of the positive numbers 2^k-57105813 is a prime.

It is a super-2 number, since 2×57105813² = 6522147756781938, 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 (57105883) 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, 306928 + ... + 307113.

It is an arithmetic number, because the mean of its divisors is an integer number (9824672).

Almost surely, 2^57105813 is an apocalyptic number.

It is an amenable number.

57105813 is a deficient number, since it is larger than the sum of its proper divisors (21491563).

57105813 is a wasteful number, since it uses less digits than its factorization.

57105813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614075.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 57105813 is about 7556.8388232117. The cubic root of 57105813 is about 385.0881071191.

Adding to 57105813 its reverse (31850175), we get a palindrome (88955988).

The spelling of 57105813 in words is "fifty-seven million, one hundred five thousand, eight hundred thirteen".