57531090 has 16 divisors (see below), whose sum is σ = 138074688. Its totient is φ = 15341616.

The previous prime is 57531053. The next prime is 57531121. The reversal of 57531090 is 9013575.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1917703 = 57531090 / (5 + 7 + 5 + 3 + 1 + 0 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958822 + ... + 958881.

It is an arithmetic number, because the mean of its divisors is an integer number (8629668).

Almost surely, 2^57531090 is an apocalyptic number.

57531090 is an abundant number, since it is smaller than the sum of its proper divisors (80543598).

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

57531090 is a wasteful number, since it uses less digits than its factorization.

57531090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917713.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 57531090 is about 7584.9251809098. The cubic root of 57531090 is about 386.0416834186.

The spelling of 57531090 in words is "fifty-seven million, five hundred thirty-one thousand, ninety".