57502381 has 4 divisors (see below), whose sum is σ = 60884892. Its totient is φ = 54119872.

The previous prime is 57502351. The next prime is 57502387. The reversal of 57502381 is 18320575.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24255625 + 33246756 = 4925^2 + 5766^2 .

It is a cyclic number.

It is not a de Polignac number, because 57502381 - 2⁷ = 57502253 is a prime.

It is a super-2 number, since 2×57502381² = 6613047641338322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57502387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691230 + ... + 1691263.

It is an arithmetic number, because the mean of its divisors is an integer number (15221223).

Almost surely, 2^57502381 is an apocalyptic number.

It is an amenable number.

57502381 is a deficient number, since it is larger than the sum of its proper divisors (3382511).

57502381 is a wasteful number, since it uses less digits than its factorization.

57502381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382510.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 57502381 is about 7583.0324409170. The cubic root of 57502381 is about 385.9774589287.

The spelling of 57502381 in words is "fifty-seven million, five hundred two thousand, three hundred eighty-one".