57131429 has 4 divisors (see below), whose sum is σ = 57154284. Its totient is φ = 57108576.

The previous prime is 57131413. The next prime is 57131443. The reversal of 57131429 is 92413175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44528929 + 12602500 = 6673^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 57131429 - 2⁴ = 57131413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57131395 and 57131404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57131449) 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, 7142 + ... + 12855.

It is an arithmetic number, because the mean of its divisors is an integer number (14288571).

Almost surely, 2^57131429 is an apocalyptic number.

It is an amenable number.

57131429 is a deficient number, since it is larger than the sum of its proper divisors (22855).

57131429 is a wasteful number, since it uses less digits than its factorization.

57131429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22854.

The product of its digits is 7560, while the sum is 32.

The square root of 57131429 is about 7558.5335217885. The cubic root of 57131429 is about 385.1456782714.

The spelling of 57131429 in words is "fifty-seven million, one hundred thirty-one thousand, four hundred twenty-nine".