57101391 has 6 divisors (see below), whose sum is σ = 82479800. Its totient is φ = 38067588.

The previous prime is 57101389. The next prime is 57101393. The reversal of 57101391 is 19310175.

It is a happy number.

57101391 is a `hidden beast` number, since 571 + 0 + 1 + 3 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (57101389) and next prime (57101393).

It is not a de Polignac number, because 57101391 - 2¹ = 57101389 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 (57101393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3172291 + ... + 3172308.

Almost surely, 2^57101391 is an apocalyptic number.

57101391 is a deficient number, since it is larger than the sum of its proper divisors (25378409).

57101391 is a wasteful number, since it uses less digits than its factorization.

57101391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344605 (or 6344602 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 57101391 is about 7556.5462348880. The cubic root of 57101391 is about 385.0781670712.

The spelling of 57101391 in words is "fifty-seven million, one hundred one thousand, three hundred ninety-one".