57155242 has 4 divisors (see below), whose sum is σ = 85732866. Its totient is φ = 28577620.

The previous prime is 57155239. The next prime is 57155251. The reversal of 57155242 is 24255175.

57155242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 137641 = 7551^2 + 371^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14288809 + ... + 14288812.

Almost surely, 2^57155242 is an apocalyptic number.

57155242 is a deficient number, since it is larger than the sum of its proper divisors (28577624).

57155242 is a wasteful number, since it uses less digits than its factorization.

57155242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28577623.

The product of its digits is 14000, while the sum is 31.

The square root of 57155242 is about 7560.1085971036. The cubic root of 57155242 is about 385.1991818054.

The spelling of 57155242 in words is "fifty-seven million, one hundred fifty-five thousand, two hundred forty-two".