55277799 has 16 divisors (see below), whose sum is σ = 78109920. Its totient is φ = 34711040.

The previous prime is 55277791. The next prime is 55277839. The reversal of 55277799 is 99777255.

It is a cyclic number.

It is not a de Polignac number, because 55277799 - 2³ = 55277791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55277791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4182 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (4881870).

Almost surely, 2^55277799 is an apocalyptic number.

55277799 is a deficient number, since it is larger than the sum of its proper divisors (22832121).

55277799 is a wasteful number, since it uses less digits than its factorization.

55277799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15570.

The product of its digits is 1389150, while the sum is 51.

The square root of 55277799 is about 7434.9041016008. The cubic root of 55277799 is about 380.9344477022.

The spelling of 55277799 in words is "fifty-five million, two hundred seventy-seven thousand, seven hundred ninety-nine".