57252381 has 8 divisors (see below), whose sum is σ = 78799104. Its totient is φ = 36936960.

The previous prime is 57252323. The next prime is 57252389. The reversal of 57252381 is 18325275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57252381 - 2⁶ = 57252317 is a prime.

It is a super-2 number, since 2×57252381² = 6555670260338322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57252389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307716 + ... + 307901.

It is an arithmetic number, because the mean of its divisors is an integer number (9849888).

Almost surely, 2^57252381 is an apocalyptic number.

It is an amenable number.

57252381 is a deficient number, since it is larger than the sum of its proper divisors (21546723).

57252381 is a wasteful number, since it uses less digits than its factorization.

57252381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615651.

The product of its digits is 16800, while the sum is 33.

The square root of 57252381 is about 7566.5303144836. The cubic root of 57252381 is about 385.4172818664.

The spelling of 57252381 in words is "fifty-seven million, two hundred fifty-two thousand, three hundred eighty-one".