309223122 has 16 divisors (see below), whose sum is σ = 666019200. Its totient is φ = 95145552.

The previous prime is 309223073. The next prime is 309223139. The reversal of 309223122 is 221322903.

It is a junction number, because it is equal to n+sod(n) for n = 309223092 and 309223101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1982122 + ... + 1982277.

It is an arithmetic number, because the mean of its divisors is an integer number (41626200).

Almost surely, 2^309223122 is an apocalyptic number.

309223122 is an abundant number, since it is smaller than the sum of its proper divisors (356796078).

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

309223122 is a wasteful number, since it uses less digits than its factorization.

309223122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964417.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 309223122 is about 17584.7411695481. The cubic root of 309223122 is about 676.2241139784.

The spelling of 309223122 in words is "three hundred nine million, two hundred twenty-three thousand, one hundred twenty-two".