55045128 has 32 divisors (see below), whose sum is σ = 144856800. Its totient is φ = 17382528.

The previous prime is 55045121. The next prime is 55045129. The reversal of 55045128 is 82154055.

It is a super-2 number, since 2×55045128² = 6059932233072768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55045095 and 55045104.

It is not an unprimeable number, because it can be changed into a prime (55045121) 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, 59901 + ... + 60812.

It is an arithmetic number, because the mean of its divisors is an integer number (4526775).

Almost surely, 2^55045128 is an apocalyptic number.

It is an amenable number.

55045128 is an abundant number, since it is smaller than the sum of its proper divisors (89811672).

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

55045128 is a wasteful number, since it uses less digits than its factorization.

55045128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120741 (or 120737 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 55045128 is about 7419.2403923852. The cubic root of 55045128 is about 380.3992295437.

The spelling of 55045128 in words is "fifty-five million, forty-five thousand, one hundred twenty-eight".