305143530 has 32 divisors (see below), whose sum is σ = 764187264. Its totient is φ = 77833536.

The previous prime is 305143519. The next prime is 305143589. The reversal of 305143530 is 35341503.

It is a happy number.

It is a super-2 number, since 2×305143530² = 186225147801721800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 305143530.

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 15 ways as a sum of consecutive naturals, for example, 220429 + ... + 221808.

It is an arithmetic number, because the mean of its divisors is an integer number (23880852).

Almost surely, 2^305143530 is an apocalyptic number.

305143530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

305143530 is an abundant number, since it is smaller than the sum of its proper divisors (459043734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305143530 is a wasteful number, since it uses less digits than its factorization.

305143530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442270.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 305143530 is about 17468.3579651895. The cubic root of 305143530 is about 673.2371228631.

The spelling of 305143530 in words is "three hundred five million, one hundred forty-three thousand, five hundred thirty".