55045320 has 192 divisors, whose sum is σ = 193052160. Its totient is φ = 12503040.

The previous prime is 55045297. The next prime is 55045321. The reversal of 55045320 is 2354055.

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

It is not an unprimeable number, because it can be changed into a prime (55045321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 246729 + ... + 246951.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^55045320 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 55045320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96526080).

55045320 is an abundant number, since it is smaller than the sum of its proper divisors (138006840).

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

55045320 is a wasteful number, since it uses less digits than its factorization.

55045320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 261 counting only the distinct ones).

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

The square root of 55045320 is about 7419.2533317039. The cubic root of 55045320 is about 380.3996718267.

Adding to 55045320 its reverse (2354055), we get a palindrome (57399375).

The spelling of 55045320 in words is "fifty-five million, forty-five thousand, three hundred twenty".