15321505341491 has 2 divisors, whose sum is σ = 15321505341492. Its totient is φ = 15321505341490.

The previous prime is 15321505341413. The next prime is 15321505341533. The reversal of 15321505341491 is 19414350512351.

It is a strong prime.

It is an emirp because it is prime and its reverse (19414350512351) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15321505341491 is a prime.

It is a super-2 number, since 2×15321505341491² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15321505344491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7660752670745 + 7660752670746.

It is an arithmetic number, because the mean of its divisors is an integer number (7660752670746).

Almost surely, 2^{15321505341491} is an apocalyptic number.

15321505341491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15321505341491 is an equidigital number, since it uses as much as digits as its factorization.

15321505341491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 15321505341491 in words is "fifteen trillion, three hundred twenty-one billion, five hundred five million, three hundred forty-one thousand, four hundred ninety-one".