54557550 has 120 divisors (see below), whose sum is σ = 159792600. Its totient is φ = 13763520.

The previous prime is 54557543. The next prime is 54557561. The reversal of 54557550 is 5575545.

It is a happy number.

54557550 is a `hidden beast` number, since 54 + 5 + 57 + 550 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 76596 + ... + 77304.

It is an arithmetic number, because the mean of its divisors is an integer number (1331605).

Almost surely, 2^54557550 is an apocalyptic number.

54557550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 54557550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79896300).

54557550 is an abundant number, since it is smaller than the sum of its proper divisors (105235050).

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

54557550 is a wasteful number, since it uses less digits than its factorization.

54557550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 738 counting only the distinct ones).

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

The square root of 54557550 is about 7386.3082795128. The cubic root of 54557550 is about 379.2727318028.

The spelling of 54557550 in words is "fifty-four million, five hundred fifty-seven thousand, five hundred fifty".