15212132342447 has 2 divisors, whose sum is σ = 15212132342448. Its totient is φ = 15212132342446.

The previous prime is 15212132342389. The next prime is 15212132342521. The reversal of 15212132342447 is 74424323121251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15212132342447 - 2¹⁰ = 15212132341423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15212132342047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606066171223 + 7606066171224.

It is an arithmetic number, because the mean of its divisors is an integer number (7606066171224).

Almost surely, 2^{15212132342447} is an apocalyptic number.

15212132342447 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212132342447 is an equidigital number, since it uses as much as digits as its factorization.

15212132342447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 41.

Adding to 15212132342447 its reverse (74424323121251), we get a palindrome (89636455463698).

The spelling of 15212132342447 in words is "fifteen trillion, two hundred twelve billion, one hundred thirty-two million, three hundred forty-two thousand, four hundred forty-seven".