306221146 has 64 divisors (see below), whose sum is σ = 592137216. Its totient is φ = 115315200.

The previous prime is 306221137. The next prime is 306221177. The reversal of 306221146 is 641122603.

It is a self number, because there is not a number n which added to its sum of digits gives 306221146.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 867306 + ... + 867658.

It is an arithmetic number, because the mean of its divisors is an integer number (9252144).

Almost surely, 2^306221146 is an apocalyptic number.

306221146 is a deficient number, since it is larger than the sum of its proper divisors (285916070).

306221146 is a wasteful number, since it uses less digits than its factorization.

306221146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 306221146 is about 17499.1755805809. The cubic root of 306221146 is about 674.0287052613.

Adding to 306221146 its reverse (641122603), we get a palindrome (947343749).

The spelling of 306221146 in words is "three hundred six million, two hundred twenty-one thousand, one hundred forty-six".