15421440223499 has 2 divisors, whose sum is σ = 15421440223500. Its totient is φ = 15421440223498.

The previous prime is 15421440223439. The next prime is 15421440223549. The reversal of 15421440223499 is 99432204412451.

15421440223499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (15421440223549) can be obtained adding 15421440223499 to its sum of digits (50).

It is a strong prime.

It is an emirp because it is prime and its reverse (99432204412451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15421440223499 - 2³⁶ = 15352720746763 is a prime.

It is not a weakly prime, because it can be changed into another prime (15421440223439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710720111749 + 7710720111750.

It is an arithmetic number, because the mean of its divisors is an integer number (7710720111750).

Almost surely, 2^{15421440223499} is an apocalyptic number.

15421440223499 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421440223499 is an equidigital number, since it uses as much as digits as its factorization.

15421440223499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 15421440223499 in words is "fifteen trillion, four hundred twenty-one billion, four hundred forty million, two hundred twenty-three thousand, four hundred ninety-nine".