55111599 has 12 divisors (see below), whose sum is σ = 80337400. Its totient is φ = 36403344.

The previous prime is 55111597. The next prime is 55111601. The reversal of 55111599 is 99511155.

55111599 is a `hidden beast` number, since 5 + 51 + 11 + 599 = 666.

It is an interprime number because it is at equal distance from previous prime (55111597) and next prime (55111601).

It is not a de Polignac number, because 55111599 - 2¹ = 55111597 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 (55111597) 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 in 11 ways as a sum of consecutive naturals, for example, 27109 + ... + 29070.

Almost surely, 2^55111599 is an apocalyptic number.

55111599 is a deficient number, since it is larger than the sum of its proper divisors (25225801).

55111599 is a wasteful number, since it uses less digits than its factorization.

55111599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56294 (or 56291 counting only the distinct ones).

The product of its digits is 10125, while the sum is 36.

The square root of 55111599 is about 7423.7186773207. The cubic root of 55111599 is about 380.5522878730.

The spelling of 55111599 in words is "fifty-five million, one hundred eleven thousand, five hundred ninety-nine".