57431247 has 4 divisors (see below), whose sum is σ = 76575000. Its totient is φ = 38287496.

The previous prime is 57431239. The next prime is 57431263. The reversal of 57431247 is 74213475.

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 57431247 - 2³ = 57431239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57431237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9571872 + ... + 9571877.

It is an arithmetic number, because the mean of its divisors is an integer number (19143750).

Almost surely, 2^57431247 is an apocalyptic number.

57431247 is a deficient number, since it is larger than the sum of its proper divisors (19143753).

57431247 is a wasteful number, since it uses less digits than its factorization.

57431247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19143752.

The product of its digits is 23520, while the sum is 33.

The square root of 57431247 is about 7578.3406495090. The cubic root of 57431247 is about 385.8182339279.

The spelling of 57431247 in words is "fifty-seven million, four hundred thirty-one thousand, two hundred forty-seven".