55115918 has 32 divisors (see below), whose sum is σ = 98122752. Its totient is φ = 22888800.

The previous prime is 55115911. The next prime is 55115927. The reversal of 55115918 is 81951155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55115911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28523 + ... + 30393.

It is an arithmetic number, because the mean of its divisors is an integer number (3066336).

Almost surely, 2^55115918 is an apocalyptic number.

55115918 is a deficient number, since it is larger than the sum of its proper divisors (43006834).

55115918 is a wasteful number, since it uses less digits than its factorization.

55115918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000.

The product of its digits is 9000, while the sum is 35.

The square root of 55115918 is about 7424.0095635714. The cubic root of 55115918 is about 380.5622286866.

The spelling of 55115918 in words is "fifty-five million, one hundred fifteen thousand, nine hundred eighteen".