15019971217 has 2 divisors, whose sum is σ = 15019971218. Its totient is φ = 15019971216.

The previous prime is 15019971167. The next prime is 15019971227. The reversal of 15019971217 is 71217991051.

It is a happy number.

15019971217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14768082576 + 251888641 = 121524^2 + 15871^2 .

It is a cyclic number.

It is not a de Polignac number, because 15019971217 - 2⁷ = 15019971089 is a prime.

It is a super-2 number, since 2×15019971217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15019971227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7509985608 + 7509985609.

It is an arithmetic number, because the mean of its divisors is an integer number (7509985609).

Almost surely, 2^15019971217 is an apocalyptic number.

It is an amenable number.

15019971217 is a deficient number, since it is larger than the sum of its proper divisors (1).

15019971217 is an equidigital number, since it uses as much as digits as its factorization.

15019971217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 43.

The spelling of 15019971217 in words is "fifteen billion, nineteen million, nine hundred seventy-one thousand, two hundred seventeen".