57144787 has 4 divisors (see below), whose sum is σ = 65308336. Its totient is φ = 48981240.

The previous prime is 57144779. The next prime is 57144797. The reversal of 57144787 is 78744175.

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

It is not a de Polignac number, because 57144787 - 2³ = 57144779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57144727) 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, 4081764 + ... + 4081777.

It is an arithmetic number, because the mean of its divisors is an integer number (16327084).

Almost surely, 2^57144787 is an apocalyptic number.

57144787 is a deficient number, since it is larger than the sum of its proper divisors (8163549).

57144787 is an equidigital number, since it uses as much as digits as its factorization.

57144787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8163548.

The product of its digits is 219520, while the sum is 43.

The square root of 57144787 is about 7559.4171071585. The cubic root of 57144787 is about 385.1756931286.

It can be divided in two parts, 5714 and 4787, that added together give a palindrome (10501).

The spelling of 57144787 in words is "fifty-seven million, one hundred forty-four thousand, seven hundred eighty-seven".