16220016431 has 2 divisors, whose sum is σ = 16220016432. Its totient is φ = 16220016430.

The previous prime is 16220016427. The next prime is 16220016469. The reversal of 16220016431 is 13461002261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16220016431 - 2² = 16220016427 is a prime.

It is a super-2 number, since 2×16220016431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16220016431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16220016331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110008215 + 8110008216.

It is an arithmetic number, because the mean of its divisors is an integer number (8110008216).

Almost surely, 2^16220016431 is an apocalyptic number.

16220016431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16220016431 is an equidigital number, since it uses as much as digits as its factorization.

16220016431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 16220016431 its reverse (13461002261), we get a palindrome (29681018692).

The spelling of 16220016431 in words is "sixteen billion, two hundred twenty million, sixteen thousand, four hundred thirty-one".