305979225 has 48 divisors (see below), whose sum is σ = 516508608. Its totient is φ = 159805440.

The previous prime is 305979221. The next prime is 305979293. The reversal of 305979225 is 522979503.

It is not a de Polignac number, because 305979225 - 2² = 305979221 is a prime.

It is a super-2 number, since 2×305979225² = 187246572263201250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (305979221) 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 47 ways as a sum of consecutive naturals, for example, 996522 + ... + 996828.

It is an arithmetic number, because the mean of its divisors is an integer number (10760596).

Almost surely, 2^305979225 is an apocalyptic number.

It is an amenable number.

305979225 is a deficient number, since it is larger than the sum of its proper divisors (210529383).

305979225 is a wasteful number, since it uses less digits than its factorization.

305979225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 305979225 is about 17492.2618606057. The cubic root of 305979225 is about 673.8511596541.

The spelling of 305979225 in words is "three hundred five million, nine hundred seventy-nine thousand, two hundred twenty-five".