305161225 has 12 divisors (see below), whose sum is σ = 381292560. Its totient is φ = 242262800.

The previous prime is 305161211. The next prime is 305161231. The reversal of 305161225 is 522161503.

It is not a de Polignac number, because 305161225 - 2⁵ = 305161193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 305161225.

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, 43315 + ... + 49864.

It is an arithmetic number, because the mean of its divisors is an integer number (31774380).

Almost surely, 2^305161225 is an apocalyptic number.

It is an amenable number.

305161225 is a deficient number, since it is larger than the sum of its proper divisors (76131335).

305161225 is a wasteful number, since it uses less digits than its factorization.

305161225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93320 (or 93315 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 305161225 is about 17468.8644450634. The cubic root of 305161225 is about 673.2501360842.

The spelling of 305161225 in words is "three hundred five million, one hundred sixty-one thousand, two hundred twenty-five".