57055431 has 8 divisors (see below), whose sum is σ = 76629744. Its totient is φ = 37759040.

The previous prime is 57055429. The next prime is 57055447. The reversal of 57055431 is 13455075.

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

It is a cyclic number.

It is not a de Polignac number, because 57055431 - 2¹ = 57055429 is a prime.

It is a super-2 number, since 2×57055431² = 6510644413191522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57055421) 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, 69000 + ... + 69821.

It is an arithmetic number, because the mean of its divisors is an integer number (9578718).

Almost surely, 2^57055431 is an apocalyptic number.

57055431 is a deficient number, since it is larger than the sum of its proper divisors (19574313).

57055431 is a wasteful number, since it uses less digits than its factorization.

57055431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138961.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 57055431 is about 7553.5045508691. The cubic root of 57055431 is about 384.9748249126.

The spelling of 57055431 in words is "fifty-seven million, fifty-five thousand, four hundred thirty-one".