306431252 has 6 divisors (see below), whose sum is σ = 536254698. Its totient is φ = 153215624.

The previous prime is 306431161. The next prime is 306431261. The reversal of 306431252 is 252134603.

It can be written as a sum of positive squares in only one way, i.e., 221533456 + 84897796 = 14884^2 + 9214^2 .

It is a super-2 number, since 2×306431252² = 187800224404575008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38303903 + ... + 38303910.

It is an arithmetic number, because the mean of its divisors is an integer number (89375783).

Almost surely, 2^306431252 is an apocalyptic number.

It is an amenable number.

306431252 is a deficient number, since it is larger than the sum of its proper divisors (229823446).

306431252 is a wasteful number, since it uses less digits than its factorization.

306431252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76607817 (or 76607815 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 306431252 is about 17505.1778625640. The cubic root of 306431252 is about 674.1828260117.

Adding to 306431252 its reverse (252134603), we get a palindrome (558565855).

The spelling of 306431252 in words is "three hundred six million, four hundred thirty-one thousand, two hundred fifty-two".