55128102 has 32 divisors (see below), whose sum is σ = 116460288. Its totient is φ = 17361696.

The previous prime is 55128091. The next prime is 55128131. The reversal of 55128102 is 20182155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9048 + ... + 13860.

It is an arithmetic number, because the mean of its divisors is an integer number (3639384).

Almost surely, 2^55128102 is an apocalyptic number.

55128102 is an abundant number, since it is smaller than the sum of its proper divisors (61332186).

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

55128102 is a wasteful number, since it uses less digits than its factorization.

55128102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 55128102 is about 7424.8300990662. The cubic root of 55128102 is about 380.5902691556.

The spelling of 55128102 in words is "fifty-five million, one hundred twenty-eight thousand, one hundred two".