55552320 has 84 divisors (see below), whose sum is σ = 191086740. Its totient is φ = 14813184.

The previous prime is 55552319. The next prime is 55552327. The reversal of 55552320 is 2325555.

It can be written as a sum of positive squares in 2 ways, for example, as 29419776 + 26132544 = 5424^2 + 5112^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55552327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6765 + ... + 12524.

Almost surely, 2^55552320 is an apocalyptic number.

It is an amenable number.

55552320 is an abundant number, since it is smaller than the sum of its proper divisors (135534420).

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

55552320 is a wasteful number, since it uses less digits than its factorization.

55552320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19312 (or 19299 counting only the distinct ones).

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

The square root of 55552320 is about 7453.3428741740. The cubic root of 55552320 is about 381.5640064676.

Adding to 55552320 its reverse (2325555), we get a palindrome (57877875).

It can be divided in two parts, 5555 and 2320, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 55552320 in words is "fifty-five million, five hundred fifty-two thousand, three hundred twenty".