309225472 has 24 divisors (see below), whose sum is σ = 618304050. Its totient is φ = 154611712.

The previous prime is 309225457. The next prime is 309225487. The reversal of 309225472 is 274522903.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (309225457) and next prime (309225487).

It can be written as a sum of positive squares in only one way, i.e., 269485056 + 39740416 = 16416^2 + 6304^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73447 + ... + 77542.

Almost surely, 2^309225472 is an apocalyptic number.

309225472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

309225472 is a deficient number, since it is larger than the sum of its proper divisors (309078578).

309225472 is an equidigital number, since it uses as much as digits as its factorization.

309225472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151011 (or 150991 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 309225472 is about 17584.8079887157. The cubic root of 309225472 is about 676.2258270054.

The spelling of 309225472 in words is "three hundred nine million, two hundred twenty-five thousand, four hundred seventy-two".