215112018 has 32 divisors (see below), whose sum is σ = 470099520. Its totient is φ = 65079360.

The previous prime is 215111993. The next prime is 215112019. The reversal of 215112018 is 810211512.

It is a junction number, because it is equal to n+sod(n) for n = 215111985 and 215112003.

It is not an unprimeable number, because it can be changed into a prime (215112019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44496 + ... + 49092.

It is an arithmetic number, because the mean of its divisors is an integer number (14690610).

Almost surely, 2^215112018 is an apocalyptic number.

215112018 is an abundant number, since it is smaller than the sum of its proper divisors (254987502).

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

215112018 is a wasteful number, since it uses less digits than its factorization.

215112018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 215112018 is about 14666.6975833007. The cubic root of 215112018 is about 599.1766651608.

The spelling of 215112018 in words is "two hundred fifteen million, one hundred twelve thousand, eighteen".