305143225 has 12 divisors (see below), whose sum is σ = 381104080. Its totient is φ = 242355600.

The previous prime is 305143219. The next prime is 305143247. The reversal of 305143225 is 522341503.

It is not a de Polignac number, because 305143225 - 2⁹ = 305142713 is a prime.

It is a super-2 number, since 2×305143225² = 186224775526801250, which contains 22 as substring.

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 305143225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40431 + ... + 47380.

Almost surely, 2^305143225 is an apocalyptic number.

It is an amenable number.

305143225 is a deficient number, since it is larger than the sum of its proper divisors (75960855).

305143225 is a wasteful number, since it uses less digits than its factorization.

305143225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87960 (or 87955 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 305143225 is about 17468.3492351166. The cubic root of 305143225 is about 673.2368985563.

Adding to 305143225 its reverse (522341503), we get a palindrome (827484728).

The spelling of 305143225 in words is "three hundred five million, one hundred forty-three thousand, two hundred twenty-five".