57121255 has 4 divisors (see below), whose sum is σ = 68545512. Its totient is φ = 45697000.

The previous prime is 57121249. The next prime is 57121261. The reversal of 57121255 is 55212175.

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

It is an interprime number because it is at equal distance from previous prime (57121249) and next prime (57121261).

It is not a de Polignac number, because 57121255 - 2⁹ = 57120743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5712121 + ... + 5712130.

It is an arithmetic number, because the mean of its divisors is an integer number (17136378).

Almost surely, 2^57121255 is an apocalyptic number.

57121255 is a deficient number, since it is larger than the sum of its proper divisors (11424257).

57121255 is a wasteful number, since it uses less digits than its factorization.

57121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11424256.

The product of its digits is 3500, while the sum is 28.

The square root of 57121255 is about 7557.8604776749. The cubic root of 57121255 is about 385.1228145877.

The spelling of 57121255 in words is "fifty-seven million, one hundred twenty-one thousand, two hundred fifty-five".