309223132 has 24 divisors (see below), whose sum is σ = 597887136. Its totient is φ = 139189248.

The previous prime is 309223073. The next prime is 309223139. The reversal of 309223132 is 231322903.

It is a junction number, because it is equal to n+sod(n) for n = 309223097 and 309223106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309223139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97293 + ... + 100420.

It is an arithmetic number, because the mean of its divisors is an integer number (24911964).

Almost surely, 2^309223132 is an apocalyptic number.

It is an amenable number.

309223132 is a deficient number, since it is larger than the sum of its proper divisors (288664004).

309223132 is a wasteful number, since it uses less digits than its factorization.

309223132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197757 (or 197755 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 309223132 is about 17584.7414538855. The cubic root of 309223132 is about 676.2241212679.

The spelling of 309223132 in words is "three hundred nine million, two hundred twenty-three thousand, one hundred thirty-two".