55277797 has 4 divisors (see below), whose sum is σ = 55295136. Its totient is φ = 55260460.

The previous prime is 55277791. The next prime is 55277839. The reversal of 55277797 is 79777255.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55277797 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 55277797.

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 3 ways as a sum of consecutive naturals, for example, 2353 + ... + 10774.

It is an arithmetic number, because the mean of its divisors is an integer number (13823784).

Almost surely, 2^55277797 is an apocalyptic number.

It is an amenable number.

55277797 is a deficient number, since it is larger than the sum of its proper divisors (17339).

55277797 is a wasteful number, since it uses less digits than its factorization.

55277797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17338.

The product of its digits is 1080450, while the sum is 49.

The square root of 55277797 is about 7434.9039671000. The cubic root of 55277797 is about 380.9344431080.

The spelling of 55277797 in words is "fifty-five million, two hundred seventy-seven thousand, seven hundred ninety-seven".