306122013 has 12 divisors (see below), whose sum is σ = 442448188. Its totient is φ = 203955840.

The previous prime is 306121961. The next prime is 306122017. The reversal of 306122013 is 310221603.

306122013 is a `hidden beast` number, since 30 + 612 + 20 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161112249 + 145009764 = 12693^2 + 12042^2 .

It is not a de Polignac number, because 306122013 - 2¹⁷ = 305990941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306122017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6423 + ... + 25563.

Almost surely, 2^306122013 is an apocalyptic number.

It is an amenable number.

306122013 is a deficient number, since it is larger than the sum of its proper divisors (136326175).

306122013 is a wasteful number, since it uses less digits than its factorization.

306122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20924 (or 20921 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 306122013 is about 17496.3428464351. The cubic root of 306122013 is about 673.9559629527.

Adding to 306122013 its reverse (310221603), we get a palindrome (616343616).

The spelling of 306122013 in words is "three hundred six million, one hundred twenty-two thousand, thirteen".