57081132 has 36 divisors (see below), whose sum is σ = 148191960. Its totient is φ = 19000872.

The previous prime is 57081127. The next prime is 57081139. The reversal of 57081132 is 23118075.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

57081132 is a `hidden beast` number, since 570 + 81 + 13 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 57081096 and 57081105.

It is not an unprimeable number, because it can be changed into a prime (57081139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78153 + ... + 78879.

Almost surely, 2^57081132 is an apocalyptic number.

It is an amenable number.

57081132 is an abundant number, since it is smaller than the sum of its proper divisors (91110828).

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

57081132 is an equidigital number, since it uses as much as digits as its factorization.

57081132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 57081132 is about 7555.2056226154. The cubic root of 57081132 is about 385.0326210623.

Multiplying 57081132 by its sum of digits (27), we get a square (1541190564 = 39258²).

57081132 divided by its sum of digits (27) gives a square (2114116 = 1454²).

The spelling of 57081132 in words is "fifty-seven million, eighty-one thousand, one hundred thirty-two".