15208712213 has 2 divisors, whose sum is σ = 15208712214. Its totient is φ = 15208712212.

The previous prime is 15208712143. The next prime is 15208712231. The reversal of 15208712213 is 31221780251.

Together with next prime (15208712231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13252153924 + 1956558289 = 115118^2 + 44233^2 .

It is an emirp because it is prime and its reverse (31221780251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15208712213 - 2¹⁴ = 15208695829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15208712213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15208712263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7604356106 + 7604356107.

It is an arithmetic number, because the mean of its divisors is an integer number (7604356107).

Almost surely, 2^15208712213 is an apocalyptic number.

It is an amenable number.

15208712213 is a deficient number, since it is larger than the sum of its proper divisors (1).

15208712213 is an equidigital number, since it uses as much as digits as its factorization.

15208712213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 15208712213 in words is "fifteen billion, two hundred eight million, seven hundred twelve thousand, two hundred thirteen".