55497599 has 4 divisors (see below), whose sum is σ = 55580736. Its totient is φ = 55414464.

The previous prime is 55497587. The next prime is 55497661. The reversal of 55497599 is 99579455.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55497599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55497599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55497529) 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, 40559 + ... + 41904.

It is an arithmetic number, because the mean of its divisors is an integer number (13895184).

Almost surely, 2^55497599 is an apocalyptic number.

55497599 is a deficient number, since it is larger than the sum of its proper divisors (83137).

55497599 is an equidigital number, since it uses as much as digits as its factorization.

55497599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83136.

The product of its digits is 2551500, while the sum is 53.

The square root of 55497599 is about 7449.6710665639. The cubic root of 55497599 is about 381.4386806279.

The spelling of 55497599 in words is "fifty-five million, four hundred ninety-seven thousand, five hundred ninety-nine".