57139855 has 16 divisors (see below), whose sum is σ = 70626528. Its totient is φ = 44352000.

The previous prime is 57139853. The next prime is 57139867. The reversal of 57139855 is 55893175.

It is not a de Polignac number, because 57139855 - 2¹ = 57139853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57139853) 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, 42595 + ... + 43915.

It is an arithmetic number, because the mean of its divisors is an integer number (4414158).

Almost surely, 2^57139855 is an apocalyptic number.

57139855 is a deficient number, since it is larger than the sum of its proper divisors (13486673).

57139855 is a wasteful number, since it uses less digits than its factorization.

57139855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its digits is 189000, while the sum is 43.

The square root of 57139855 is about 7559.0908844913. The cubic root of 57139855 is about 385.1646116793.

The spelling of 57139855 in words is "fifty-seven million, one hundred thirty-nine thousand, eight hundred fifty-five".