57131145 has 24 divisors (see below), whose sum is σ = 101706696. Its totient is φ = 29645568.

The previous prime is 57131143. The next prime is 57131153. The reversal of 57131145 is 54113175.

It can be written as a sum of positive squares in 4 ways, for example, as 10673289 + 46457856 = 3267^2 + 6816^2 .

It is not a de Polignac number, because 57131145 - 2¹ = 57131143 is a prime.

It is a super-2 number, since 2×57131145² = 6527935458022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57131143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15492 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (4237779).

Almost surely, 2^57131145 is an apocalyptic number.

It is an amenable number.

57131145 is a deficient number, since it is larger than the sum of its proper divisors (44575551).

57131145 is a wasteful number, since it uses less digits than its factorization.

57131145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34361 (or 34358 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 57131145 is about 7558.5147350521. The cubic root of 57131145 is about 385.1450400847.

The spelling of 57131145 in words is "fifty-seven million, one hundred thirty-one thousand, one hundred forty-five".