55504320 has 224 divisors, whose sum is σ = 197510400. Its totient is φ = 13123584.

The previous prime is 55504297. The next prime is 55504343. The reversal of 55504320 is 2340555.

It is an interprime number because it is at equal distance from previous prime (55504297) and next prime (55504343).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309991 + ... + 310169.

Almost surely, 2^55504320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55504320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98755200).

55504320 is an abundant number, since it is smaller than the sum of its proper divisors (142006080).

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

55504320 is a wasteful number, since it uses less digits than its factorization.

55504320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 55504320 is about 7450.1221466497. The cubic root of 55504320 is about 381.4540779660.

Adding to 55504320 its reverse (2340555), we get a palindrome (57844875).

It can be divided in two parts, 5550 and 4320, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 55504320 in words is "fifty-five million, five hundred four thousand, three hundred twenty".