15221242541431 has 2 divisors, whose sum is σ = 15221242541432. Its totient is φ = 15221242541430.

The previous prime is 15221242541429. The next prime is 15221242541441. The reversal of 15221242541431 is 13414524212251.

It is a weak prime.

It is an emirp because it is prime and its reverse (13414524212251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15221242541431 - 2¹ = 15221242541429 is a prime.

It is a super-2 number, since 2×15221242541431² (a number of 27 digits) contains 22 as substring.

Together with 15221242541429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15221242541441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610621270715 + 7610621270716.

It is an arithmetic number, because the mean of its divisors is an integer number (7610621270716).

Almost surely, 2^{15221242541431} is an apocalyptic number.

15221242541431 is a deficient number, since it is larger than the sum of its proper divisors (1).

15221242541431 is an equidigital number, since it uses as much as digits as its factorization.

15221242541431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 37.

Adding to 15221242541431 its reverse (13414524212251), we get a palindrome (28635766753682).

The spelling of 15221242541431 in words is "fifteen trillion, two hundred twenty-one billion, two hundred forty-two million, five hundred forty-one thousand, four hundred thirty-one".