55277750 has 32 divisors (see below), whose sum is σ = 112892832. Its totient is φ = 20100000.

The previous prime is 55277713. The next prime is 55277753. The reversal of 55277750 is 5777255.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55277753) 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, 7301 + ... + 12800.

It is an arithmetic number, because the mean of its divisors is an integer number (3527901).

Almost surely, 2^55277750 is an apocalyptic number.

55277750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55277750 is an abundant number, since it is smaller than the sum of its proper divisors (57615082).

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

55277750 is a wasteful number, since it uses less digits than its factorization.

55277750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129 (or 20119 counting only the distinct ones).

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 55277750 is about 7434.9008063323. The cubic root of 55277750 is about 380.9343351447.

The spelling of 55277750 in words is "fifty-five million, two hundred seventy-seven thousand, seven hundred fifty".