15412221491 has 2 divisors, whose sum is σ = 15412221492. Its totient is φ = 15412221490.

The previous prime is 15412221463. The next prime is 15412221493. The reversal of 15412221491 is 19412221451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15412221491 - 2⁶ = 15412221427 is a prime.

Together with 15412221493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15412221493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7706110745 + 7706110746.

It is an arithmetic number, because the mean of its divisors is an integer number (7706110746).

Almost surely, 2^15412221491 is an apocalyptic number.

15412221491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15412221491 is an equidigital number, since it uses as much as digits as its factorization.

15412221491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The spelling of 15412221491 in words is "fifteen billion, four hundred twelve million, two hundred twenty-one thousand, four hundred ninety-one".