309412225 has 12 divisors (see below), whose sum is σ = 390175920. Its totient is φ = 243333200.

The previous prime is 309412183. The next prime is 309412247. The reversal of 309412225 is 522214903.

It is not a de Polignac number, because 309412225 - 2¹¹ = 309410177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309412193 and 309412202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103411 + ... + 106360.

It is an arithmetic number, because the mean of its divisors is an integer number (32514660).

Almost surely, 2^309412225 is an apocalyptic number.

It is an amenable number.

309412225 is a deficient number, since it is larger than the sum of its proper divisors (80763695).

309412225 is a wasteful number, since it uses less digits than its factorization.

309412225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209840 (or 209835 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 309412225 is about 17590.1172537309. The cubic root of 309412225 is about 676.3619324243.

The spelling of 309412225 in words is "three hundred nine million, four hundred twelve thousand, two hundred twenty-five".