15947212447 has 2 divisors, whose sum is σ = 15947212448. Its totient is φ = 15947212446.

The previous prime is 15947212339. The next prime is 15947212481. The reversal of 15947212447 is 74421274951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15947212447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15947212397 and 15947212406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15947212147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7973606223 + 7973606224.

It is an arithmetic number, because the mean of its divisors is an integer number (7973606224).

Almost surely, 2^15947212447 is an apocalyptic number.

15947212447 is a deficient number, since it is larger than the sum of its proper divisors (1).

15947212447 is an equidigital number, since it uses as much as digits as its factorization.

15947212447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The spelling of 15947212447 in words is "fifteen billion, nine hundred forty-seven million, two hundred twelve thousand, four hundred forty-seven".