815523222 has 8 divisors (see below), whose sum is σ = 1631046456. Its totient is φ = 271841072.

The previous prime is 815523221. The next prime is 815523227. The reversal of 815523222 is 222325518.

It is a sphenic number, since it is the product of 3 distinct primes.

815523222 is an admirable number.

It is a super-2 number, since 2×815523222² = 1330156251242522568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 815523222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815523221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67960263 + ... + 67960274.

It is an arithmetic number, because the mean of its divisors is an integer number (203880807).

Almost surely, 2^815523222 is an apocalyptic number.

815523222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

815523222 is a wasteful number, since it uses less digits than its factorization.

815523222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135920542.

The product of its digits is 9600, while the sum is 30.

The square root of 815523222 is about 28557.3672105816. The cubic root of 815523222 is about 934.2837115573.

The spelling of 815523222 in words is "eight hundred fifteen million, five hundred twenty-three thousand, two hundred twenty-two".