55277855 has 12 divisors (see below), whose sum is σ = 69346200. Its totient is φ = 42297552.

The previous prime is 55277851. The next prime is 55277861. The reversal of 55277855 is 55877255.

It is not a de Polignac number, because 55277855 - 2² = 55277851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55277851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7805 + ... + 13094.

It is an arithmetic number, because the mean of its divisors is an integer number (5778850).

Almost surely, 2^55277855 is an apocalyptic number.

55277855 is a deficient number, since it is larger than the sum of its proper divisors (14068345).

55277855 is a wasteful number, since it uses less digits than its factorization.

55277855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20950 (or 20927 counting only the distinct ones).

The product of its digits is 490000, while the sum is 44.

The square root of 55277855 is about 7434.9078676201. The cubic root of 55277855 is about 380.9345763393.

The spelling of 55277855 in words is "fifty-five million, two hundred seventy-seven thousand, eight hundred fifty-five".