57021132 has 24 divisors (see below), whose sum is σ = 152056576. Its totient is φ = 16291728.

The previous prime is 57021131. The next prime is 57021161. The reversal of 57021132 is 23112075.

It is a super-2 number, since 2×57021132² = 6502818989122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 57021099 and 57021108.

It is not an unprimeable number, because it can be changed into a prime (57021131) 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, 339328 + ... + 339495.

Almost surely, 2^57021132 is an apocalyptic number.

It is an amenable number.

57021132 is an abundant number, since it is smaller than the sum of its proper divisors (95035444).

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

57021132 is a wasteful number, since it uses less digits than its factorization.

57021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678837 (or 678835 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 57021132 is about 7551.2338064716. The cubic root of 57021132 is about 384.8976666234.

The spelling of 57021132 in words is "fifty-seven million, twenty-one thousand, one hundred thirty-two".