55332480 has 256 divisors, whose sum is σ = 211507200. Its totient is φ = 12029952.

The previous prime is 55332479. The next prime is 55332481. The reversal of 55332480 is 8423355.

It is an interprime number because it is at equal distance from previous prime (55332479) and next prime (55332481).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55332481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309031 + ... + 309209.

It is an arithmetic number, because the mean of its divisors is an integer number (826200).

Almost surely, 2^55332480 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 55332480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105753600).

55332480 is an abundant number, since it is smaller than the sum of its proper divisors (156174720).

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

55332480 is a wasteful number, since it uses less digits than its factorization.

55332480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 55332480 is about 7438.5805097478. The cubic root of 55332480 is about 381.0600135553.

It can be divided in two parts, 553 and 32480, that added together give a palindrome (33033).

The spelling of 55332480 in words is "fifty-five million, three hundred thirty-two thousand, four hundred eighty".