55916599 has 4 divisors (see below), whose sum is σ = 55933264. Its totient is φ = 55899936.

The previous prime is 55916573. The next prime is 55916617. The reversal of 55916599 is 99561955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99561955 = 5 ⋅19912391.

It is a cyclic number.

It is not a de Polignac number, because 55916599 - 2¹⁵ = 55883831 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 (55916569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (13983316).

Almost surely, 2^55916599 is an apocalyptic number.

55916599 is a deficient number, since it is larger than the sum of its proper divisors (16665).

55916599 is a wasteful number, since it uses less digits than its factorization.

55916599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16664.

The product of its digits is 546750, while the sum is 49.

The square root of 55916599 is about 7477.7402335197. The cubic root of 55916599 is about 382.3962131729.

The spelling of 55916599 in words is "fifty-five million, nine hundred sixteen thousand, five hundred ninety-nine".