57291139 has 16 divisors (see below), whose sum is σ = 62379936. Its totient is φ = 52416000.

The previous prime is 57291121. The next prime is 57291149. The reversal of 57291139 is 93119275.

It is a cyclic number.

It is not a de Polignac number, because 57291139 - 2¹¹ = 57289091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57291098 and 57291107.

It is not an unprimeable number, because it can be changed into a prime (57291109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104464 + ... + 105010.

It is an arithmetic number, because the mean of its divisors is an integer number (3898746).

Almost surely, 2^57291139 is an apocalyptic number.

57291139 is a deficient number, since it is larger than the sum of its proper divisors (5088797).

57291139 is a wasteful number, since it uses less digits than its factorization.

57291139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 17010, while the sum is 37.

The square root of 57291139 is about 7569.0910286507. The cubic root of 57291139 is about 385.5042339033.

The spelling of 57291139 in words is "fifty-seven million, two hundred ninety-one thousand, one hundred thirty-nine".