57287431 has 8 divisors (see below), whose sum is σ = 58101840. Its totient is φ = 56476992.

The previous prime is 57287429. The next prime is 57287443. The reversal of 57287431 is 13478275.

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 57287431 - 2¹ = 57287429 is a prime.

It is a super-2 number, since 2×57287431² = 6563699501159522, 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 (57287401) 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, 38701 + ... + 40153.

It is an arithmetic number, because the mean of its divisors is an integer number (7262730).

Almost surely, 2^57287431 is an apocalyptic number.

57287431 is a deficient number, since it is larger than the sum of its proper divisors (814409).

57287431 is a wasteful number, since it uses less digits than its factorization.

57287431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985.

The product of its digits is 47040, while the sum is 37.

The square root of 57287431 is about 7568.8460811408. The cubic root of 57287431 is about 385.4959168490.

The spelling of 57287431 in words is "fifty-seven million, two hundred eighty-seven thousand, four hundred thirty-one".