57431487 has 8 divisors (see below), whose sum is σ = 76613760. Its totient is φ = 38268440.

The previous prime is 57431477. The next prime is 57431503. The reversal of 57431487 is 78413475.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57431487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57431417) 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 7 ways as a sum of consecutive naturals, for example, 5062 + ... + 11852.

It is an arithmetic number, because the mean of its divisors is an integer number (9576720).

Almost surely, 2^57431487 is an apocalyptic number.

57431487 is a deficient number, since it is larger than the sum of its proper divisors (19182273).

57431487 is a wasteful number, since it uses less digits than its factorization.

57431487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613.

The product of its digits is 94080, while the sum is 39.

The square root of 57431487 is about 7578.3564840934. The cubic root of 57431487 is about 385.8187713603.

The spelling of 57431487 in words is "fifty-seven million, four hundred thirty-one thousand, four hundred eighty-seven".