57156516 has 84 divisors (see below), whose sum is σ = 158926572. Its totient is φ = 17915904.

The previous prime is 57156509. The next prime is 57156521. The reversal of 57156516 is 61565175.

It can be written as a sum of positive squares in 2 ways, for example, as 44836416 + 12320100 = 6696^2 + 3510^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 48996 + ... + 50148.

It is an arithmetic number, because the mean of its divisors is an integer number (1891983).

Almost surely, 2^57156516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57156516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79463286).

57156516 is an abundant number, since it is smaller than the sum of its proper divisors (101770056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57156516 is a wasteful number, since it uses less digits than its factorization.

57156516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1175 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 57156516 is about 7560.1928546830. The cubic root of 57156516 is about 385.2020438358.

The spelling of 57156516 in words is "fifty-seven million, one hundred fifty-six thousand, five hundred sixteen".