15312023213 has 2 divisors, whose sum is σ = 15312023214. Its totient is φ = 15312023212.

The previous prime is 15312023201. The next prime is 15312023231. The reversal of 15312023213 is 31232021351.

Together with next prime (15312023231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9398720809 + 5913302404 = 96947^2 + 76898^2 .

It is an emirp because it is prime and its reverse (31232021351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15312023213 - 2⁶ = 15312023149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15312023413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7656011606 + 7656011607.

It is an arithmetic number, because the mean of its divisors is an integer number (7656011607).

Almost surely, 2^15312023213 is an apocalyptic number.

It is an amenable number.

15312023213 is a deficient number, since it is larger than the sum of its proper divisors (1).

15312023213 is an equidigital number, since it uses as much as digits as its factorization.

15312023213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 15312023213 its reverse (31232021351), we get a palindrome (46544044564).

The spelling of 15312023213 in words is "fifteen billion, three hundred twelve million, twenty-three thousand, two hundred thirteen".