57155143 has 4 divisors (see below), whose sum is σ = 59126040. Its totient is φ = 55184248.

The previous prime is 57155113. The next prime is 57155159. The reversal of 57155143 is 34155175.

57155143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57155143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57155113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985405 + ... + 985462.

It is an arithmetic number, because the mean of its divisors is an integer number (14781510).

Almost surely, 2^57155143 is an apocalyptic number.

57155143 is a deficient number, since it is larger than the sum of its proper divisors (1970897).

57155143 is a wasteful number, since it uses less digits than its factorization.

57155143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970896.

The product of its digits is 10500, while the sum is 31.

The square root of 57155143 is about 7560.1020495758. The cubic root of 57155143 is about 385.1989594010.

The spelling of 57155143 in words is "fifty-seven million, one hundred fifty-five thousand, one hundred forty-three".