309241225 has 12 divisors (see below), whose sum is σ = 383707584. Its totient is φ = 247232720.

The previous prime is 309241217. The next prime is 309241241. The reversal of 309241225 is 522142903.

It is not a de Polignac number, because 309241225 - 2³ = 309241217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 309241193 and 309241202.

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, 49212 + ... + 55138.

It is an arithmetic number, because the mean of its divisors is an integer number (31975632).

Almost surely, 2^309241225 is an apocalyptic number.

It is an amenable number.

309241225 is a deficient number, since it is larger than the sum of its proper divisors (74466359).

309241225 is a wasteful number, since it uses less digits than its factorization.

309241225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024 (or 8019 counting only the distinct ones).

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

The square root of 309241225 is about 17585.2558980528. The cubic root of 309241225 is about 676.2373098936.

The spelling of 309241225 in words is "three hundred nine million, two hundred forty-one thousand, two hundred twenty-five".