57431647 has 16 divisors (see below), whose sum is σ = 70891072. Its totient is φ = 45308160.

The previous prime is 57431641. The next prime is 57431651. The reversal of 57431647 is 74613475.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57431647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57431641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40897 + ... + 42277.

It is an arithmetic number, because the mean of its divisors is an integer number (4430692).

Almost surely, 2^57431647 is an apocalyptic number.

57431647 is a deficient number, since it is larger than the sum of its proper divisors (13459425).

57431647 is a wasteful number, since it uses less digits than its factorization.

57431647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its digits is 70560, while the sum is 37.

The square root of 57431647 is about 7578.3670404646. The cubic root of 57431647 is about 385.8191296478.

It can be divided in two parts, 574 and 31647, that multiplied together give a triangular number (18165378 = T₆₀₂₇).

The spelling of 57431647 in words is "fifty-seven million, four hundred thirty-one thousand, six hundred forty-seven".