55787277 has 32 divisors (see below), whose sum is σ = 92135680. Its totient is φ = 29237760.

The previous prime is 55787269. The next prime is 55787279. The reversal of 55787277 is 77278755.

It is not a de Polignac number, because 55787277 - 2³ = 55787269 is a prime.

It is a super-2 number, since 2×55787277² = 6224440550149458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55787279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48849 + ... + 49977.

It is an arithmetic number, because the mean of its divisors is an integer number (2879240).

Almost surely, 2^55787277 is an apocalyptic number.

It is an amenable number.

55787277 is a deficient number, since it is larger than the sum of its proper divisors (36348403).

55787277 is a wasteful number, since it uses less digits than its factorization.

55787277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its digits is 960400, while the sum is 48.

The square root of 55787277 is about 7469.0880969500. The cubic root of 55787277 is about 382.1011879816.

The spelling of 55787277 in words is "fifty-five million, seven hundred eighty-seven thousand, two hundred seventy-seven".