57481530 has 16 divisors (see below), whose sum is σ = 137955744. Its totient is φ = 15328400.

The previous prime is 57481513. The next prime is 57481537. The reversal of 57481530 is 3518475.

It is a super-2 number, since 2×57481530² = 6608252582281800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 57481491 and 57481500.

It is not an unprimeable number, because it can be changed into a prime (57481537) 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, 957996 + ... + 958055.

It is an arithmetic number, because the mean of its divisors is an integer number (8622234).

Almost surely, 2^57481530 is an apocalyptic number.

57481530 is an abundant number, since it is smaller than the sum of its proper divisors (80474214).

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

57481530 is a wasteful number, since it uses less digits than its factorization.

57481530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916061.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 57481530 is about 7581.6574705008. The cubic root of 57481530 is about 385.9308000552.

The spelling of 57481530 in words is "fifty-seven million, four hundred eighty-one thousand, five hundred thirty".