15212651197 has 2 divisors, whose sum is σ = 15212651198. Its totient is φ = 15212651196.

The previous prime is 15212651183. The next prime is 15212651219. The reversal of 15212651197 is 79115621251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12665026521 + 2547624676 = 112539^2 + 50474^2 .

It is an emirp because it is prime and its reverse (79115621251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15212651197 - 2¹⁵ = 15212618429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15212951197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606325598 + 7606325599.

It is an arithmetic number, because the mean of its divisors is an integer number (7606325599).

Almost surely, 2^15212651197 is an apocalyptic number.

It is an amenable number.

15212651197 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212651197 is an equidigital number, since it uses as much as digits as its factorization.

15212651197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 40.

The spelling of 15212651197 in words is "fifteen billion, two hundred twelve million, six hundred fifty-one thousand, one hundred ninety-seven".