55304550 has 144 divisors (see below), whose sum is σ = 172509792. Its totient is φ = 12441600.

The previous prime is 55304549. The next prime is 55304567. The reversal of 55304550 is 5540355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 305460 + ... + 305640.

Almost surely, 2^55304550 is an apocalyptic number.

55304550 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 55304550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86254896).

55304550 is an abundant number, since it is smaller than the sum of its proper divisors (117205242).

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

55304550 is a wasteful number, since it uses less digits than its factorization.

55304550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55304550 is about 7436.7028984625. The cubic root of 55304550 is about 380.9958872807.

The spelling of 55304550 in words is "fifty-five million, three hundred four thousand, five hundred fifty".