815541222 has 32 divisors (see below), whose sum is σ = 1703605248. Its totient is φ = 259782336.

The previous prime is 815541197. The next prime is 815541271. The reversal of 815541222 is 222145518.

815541222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 815541222.

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, 194298 + ... + 198450.

It is an arithmetic number, because the mean of its divisors is an integer number (53237664).

Almost surely, 2^815541222 is an apocalyptic number.

815541222 is an abundant number, since it is smaller than the sum of its proper divisors (888064026).

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

815541222 is a wasteful number, since it uses less digits than its factorization.

815541222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604.

The product of its digits is 6400, while the sum is 30.

The square root of 815541222 is about 28557.6823639454. The cubic root of 815541222 is about 934.2905852562.

The spelling of 815541222 in words is "eight hundred fifteen million, five hundred forty-one thousand, two hundred twenty-two".