55450120 has 32 divisors (see below), whose sum is σ = 136105920. Its totient is φ = 20163520.

The previous prime is 55450093. The next prime is 55450127. The reversal of 55450120 is 2105455.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 55450091 and 55450100.

It is not an unprimeable number, because it can be changed into a prime (55450127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62572 + ... + 63451.

It is an arithmetic number, because the mean of its divisors is an integer number (4253310).

Almost surely, 2^55450120 is an apocalyptic number.

It is an amenable number.

55450120 is an abundant number, since it is smaller than the sum of its proper divisors (80655800).

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

55450120 is a wasteful number, since it uses less digits than its factorization.

55450120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126045 (or 126041 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55450120 is about 7446.4837339512. The cubic root of 55450120 is about 381.3298741543.

Adding to 55450120 its reverse (2105455), we get a palindrome (57555575).

The spelling of 55450120 in words is "fifty-five million, four hundred fifty thousand, one hundred twenty".