55412320 has 48 divisors (see below), whose sum is σ = 134120448. Its totient is φ = 21621760.

The previous prime is 55412311. The next prime is 55412323. The reversal of 55412320 is 2321455.

It is a junction number, because it is equal to n+sod(n) for n = 55412291 and 55412300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55412323) 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 7 ways as a sum of consecutive naturals, for example, 2337 + ... + 10783.

It is an arithmetic number, because the mean of its divisors is an integer number (2794176).

Almost surely, 2^55412320 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 55412320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67060224).

55412320 is an abundant number, since it is smaller than the sum of its proper divisors (78708128).

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

55412320 is a wasteful number, since it uses less digits than its factorization.

55412320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8503 (or 8495 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55412320 is about 7443.9451905559. The cubic root of 55412320 is about 381.2432043938.

Adding to 55412320 its reverse (2321455), we get a palindrome (57733775).

The spelling of 55412320 in words is "fifty-five million, four hundred twelve thousand, three hundred twenty".