55247799 has 4 divisors (see below), whose sum is σ = 73663736. Its totient is φ = 36831864.

The previous prime is 55247791. The next prime is 55247821. The reversal of 55247799 is 99774255.

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

It is not a de Polignac number, because 55247799 - 2³ = 55247791 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 (55247791) 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, 9207964 + ... + 9207969.

It is an arithmetic number, because the mean of its divisors is an integer number (18415934).

Almost surely, 2^55247799 is an apocalyptic number.

55247799 is a deficient number, since it is larger than the sum of its proper divisors (18415937).

55247799 is a wasteful number, since it uses less digits than its factorization.

55247799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18415936.

The product of its digits is 793800, while the sum is 48.

The square root of 55247799 is about 7432.8863169027. The cubic root of 55247799 is about 380.8655224939.

The spelling of 55247799 in words is "fifty-five million, two hundred forty-seven thousand, seven hundred ninety-nine".