57031487 has 4 divisors (see below), whose sum is σ = 58998120. Its totient is φ = 55064856.

The previous prime is 57031477. The next prime is 57031489. The reversal of 57031487 is 78413075.

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

It is a cyclic number.

It is not a de Polignac number, because 57031487 - 2¹⁸ = 56769343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57031489) by changing a digit.

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, 983273 + ... + 983330.

It is an arithmetic number, because the mean of its divisors is an integer number (14749530).

Almost surely, 2^57031487 is an apocalyptic number.

57031487 is a deficient number, since it is larger than the sum of its proper divisors (1966633).

57031487 is a wasteful number, since it uses less digits than its factorization.

57031487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966632.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 57031487 is about 7551.9194248880. The cubic root of 57031487 is about 384.9209642674.

The spelling of 57031487 in words is "fifty-seven million, thirty-one thousand, four hundred eighty-seven".