55325520 has 120 divisors (see below), whose sum is σ = 190228896. Its totient is φ = 14402304.

The previous prime is 55325519. The next prime is 55325521. The reversal of 55325520 is 2552355.

It is an interprime number because it is at equal distance from previous prime (55325519) and next prime (55325521).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55325521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30067 + ... + 31853.

Almost surely, 2^55325520 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 55325520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95114448).

55325520 is an abundant number, since it is smaller than the sum of its proper divisors (134903376).

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

55325520 is a wasteful number, since it uses less digits than its factorization.

55325520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1840 counting only the distinct ones).

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

The square root of 55325520 is about 7438.1126638415. The cubic root of 55325520 is about 381.0440356649.

Adding to 55325520 its reverse (2552355), we get a palindrome (57877875).

The spelling of 55325520 in words is "fifty-five million, three hundred twenty-five thousand, five hundred twenty".