14220531991 has 2 divisors, whose sum is σ = 14220531992. Its totient is φ = 14220531990.

The previous prime is 14220531961. The next prime is 14220532019. The reversal of 14220531991 is 19913502241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14220531991 - 2¹⁷ = 14220400919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14220531991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14220531961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7110265995 + 7110265996.

It is an arithmetic number, because the mean of its divisors is an integer number (7110265996).

Almost surely, 2^14220531991 is an apocalyptic number.

14220531991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14220531991 is an equidigital number, since it uses as much as digits as its factorization.

14220531991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 14220531991 in words is "fourteen billion, two hundred twenty million, five hundred thirty-one thousand, nine hundred ninety-one".