55545138 has 48 divisors (see below), whose sum is σ = 137007936. Its totient is φ = 16098720.

The previous prime is 55545109. The next prime is 55545157. The reversal of 55545138 is 83154555.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1545 + ... + 10652.

It is an arithmetic number, because the mean of its divisors is an integer number (2854332).

Almost surely, 2^55545138 is an apocalyptic number.

55545138 is an abundant number, since it is smaller than the sum of its proper divisors (81462798).

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

55545138 is a wasteful number, since it uses less digits than its factorization.

55545138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239 (or 12236 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 55545138 is about 7452.8610613643. The cubic root of 55545138 is about 381.5475624451.

The spelling of 55545138 in words is "fifty-five million, five hundred forty-five thousand, one hundred thirty-eight".