55457550 has 36 divisors (see below), whose sum is σ = 148997160. Its totient is φ = 14788560.

The previous prime is 55457539. The next prime is 55457579. The reversal of 55457550 is 5575455.

It is a happy number.

55457550 is a `hidden beast` number, since 5 + 54 + 57 + 550 = 666.

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, 61170 + ... + 62069.

It is an arithmetic number, because the mean of its divisors is an integer number (4138810).

Almost surely, 2^55457550 is an apocalyptic number.

55457550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55457550 is an abundant number, since it is smaller than the sum of its proper divisors (93539610).

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

55457550 is a wasteful number, since it uses less digits than its factorization.

55457550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123257 (or 123249 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The square root of 55457550 is about 7446.9826104269. The cubic root of 55457550 is about 381.3469054034.

The spelling of 55457550 in words is "fifty-five million, four hundred fifty-seven thousand, five hundred fifty".