57143961 has 40 divisors (see below), whose sum is σ = 98658560. Its totient is φ = 32285952.

The previous prime is 57143959. The next prime is 57143969. The reversal of 57143961 is 16934175.

It is not a de Polignac number, because 57143961 - 2¹ = 57143959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57143969) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54480 + ... + 55518.

It is an arithmetic number, because the mean of its divisors is an integer number (2466464).

Almost surely, 2^57143961 is an apocalyptic number.

It is an amenable number.

57143961 is a deficient number, since it is larger than the sum of its proper divisors (41514599).

57143961 is a wasteful number, since it uses less digits than its factorization.

57143961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1146 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 57143961 is about 7559.3624731190. The cubic root of 57143961 is about 385.1738372774.

The spelling of 57143961 in words is "fifty-seven million, one hundred forty-three thousand, nine hundred sixty-one".