55249599 has 4 divisors (see below), whose sum is σ = 73666136. Its totient is φ = 36833064.

The previous prime is 55249577. The next prime is 55249619. The reversal of 55249599 is 99594255.

It is a happy number.

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

It is not a de Polignac number, because 55249599 - 2⁹ = 55249087 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 (55249559) 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, 9208264 + ... + 9208269.

It is an arithmetic number, because the mean of its divisors is an integer number (18416534).

Almost surely, 2^55249599 is an apocalyptic number.

55249599 is a deficient number, since it is larger than the sum of its proper divisors (18416537).

55249599 is a wasteful number, since it uses less digits than its factorization.

55249599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416536.

The product of its digits is 729000, while the sum is 48.

The square root of 55249599 is about 7433.0073994313. The cubic root of 55249599 is about 380.8696587099.

The spelling of 55249599 in words is "fifty-five million, two hundred forty-nine thousand, five hundred ninety-nine".