57161250 has 60 divisors (see below), whose sum is σ = 154792638. Its totient is φ = 15240000.

The previous prime is 57161249. The next prime is 57161281. The reversal of 57161250 is 5216175.

It can be written as a sum of positive squares in 5 ways, for example, as 505521 + 56655729 = 711^2 + 7527^2 .

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 29 ways as a sum of consecutive naturals, for example, 8710 + ... + 13790.

Almost surely, 2^57161250 is an apocalyptic number.

57161250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 57161250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77396319).

57161250 is an abundant number, since it is smaller than the sum of its proper divisors (97631388).

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

57161250 is a wasteful number, since it uses less digits than its factorization.

57161250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 5091 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 57161250 is about 7560.5059354517. The cubic root of 57161250 is about 385.2126783546.

The spelling of 57161250 in words is "fifty-seven million, one hundred sixty-one thousand, two hundred fifty".