57145506 has 32 divisors (see below), whose sum is σ = 126551808. Its totient is φ = 17057040.

The previous prime is 57145477. The next prime is 57145511. The reversal of 57145506 is 60554175.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 10883.

It is an arithmetic number, because the mean of its divisors is an integer number (3954744).

Almost surely, 2^57145506 is an apocalyptic number.

57145506 is an abundant number, since it is smaller than the sum of its proper divisors (69406302).

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

57145506 is a wasteful number, since it uses less digits than its factorization.

57145506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 57145506 is about 7559.4646635856. The cubic root of 57145506 is about 385.1773085583.

The spelling of 57145506 in words is "fifty-seven million, one hundred forty-five thousand, five hundred six".