57249143 has 4 divisors (see below), whose sum is σ = 65427600. Its totient is φ = 49070688.

The previous prime is 57249133. The next prime is 57249197. The reversal of 57249143 is 34194275.

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 57249143 - 2¹² = 57245047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57249113) 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, 4089218 + ... + 4089231.

It is an arithmetic number, because the mean of its divisors is an integer number (16356900).

Almost surely, 2^57249143 is an apocalyptic number.

57249143 is a deficient number, since it is larger than the sum of its proper divisors (8178457).

57249143 is an equidigital number, since it uses as much as digits as its factorization.

57249143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8178456.

The product of its digits is 30240, while the sum is 35.

The square root of 57249143 is about 7566.3163428448. The cubic root of 57249143 is about 385.4100157658.

The spelling of 57249143 in words is "fifty-seven million, two hundred forty-nine thousand, one hundred forty-three".