304400311213 has 2 divisors, whose sum is σ = 304400311214. Its totient is φ = 304400311212.

The previous prime is 304400311199. The next prime is 304400311279. The reversal of 304400311213 is 312113004403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159222546729 + 145177764484 = 399027^2 + 381022^2 .

It is a cyclic number.

It is not a de Polignac number, because 304400311213 - 2²¹ = 304398214061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304400311913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152200155606 + 152200155607.

It is an arithmetic number, because the mean of its divisors is an integer number (152200155607).

Almost surely, 2^304400311213 is an apocalyptic number.

It is an amenable number.

304400311213 is a deficient number, since it is larger than the sum of its proper divisors (1).

304400311213 is an equidigital number, since it uses as much as digits as its factorization.

304400311213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 304400311213 its reverse (312113004403), we get a palindrome (616513315616).

The spelling of 304400311213 in words is "three hundred four billion, four hundred million, three hundred eleven thousand, two hundred thirteen".