57139519 has 2 divisors, whose sum is σ = 57139520. Its totient is φ = 57139518.

The previous prime is 57139501. The next prime is 57139547. The reversal of 57139519 is 91593175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57139519 - 2²¹ = 55042367 is a prime.

It is a super-2 number, since 2×57139519² = 6529849263102722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57139219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28569759 + 28569760.

It is an arithmetic number, because the mean of its divisors is an integer number (28569760).

Almost surely, 2^57139519 is an apocalyptic number.

57139519 is a deficient number, since it is larger than the sum of its proper divisors (1).

57139519 is an equidigital number, since it uses as much as digits as its factorization.

57139519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 40.

The square root of 57139519 is about 7559.0686595638. The cubic root of 57139519 is about 385.1638567155.

The spelling of 57139519 in words is "fifty-seven million, one hundred thirty-nine thousand, five hundred nineteen".