55277550 has 36 divisors (see below), whose sum is σ = 148513560. Its totient is φ = 14740560.

The previous prime is 55277549. The next prime is 55277597. The reversal of 55277550 is 5577255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60970 + ... + 61869.

Almost surely, 2^55277550 is an apocalyptic number.

55277550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55277550 is an abundant number, since it is smaller than the sum of its proper divisors (93236010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55277550 is a wasteful number, since it uses less digits than its factorization.

55277550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122857 (or 122849 counting only the distinct ones).

The product of its (nonzero) digits is 61250, while the sum is 36.

The square root of 55277550 is about 7434.8873562415. The cubic root of 55277550 is about 380.9338757256.

The spelling of 55277550 in words is "fifty-five million, two hundred seventy-seven thousand, five hundred fifty".