22020216551 has 2 divisors, whose sum is σ = 22020216552. Its totient is φ = 22020216550.

The previous prime is 22020216541. The next prime is 22020216557. The reversal of 22020216551 is 15561202022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22020216551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22020216551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020216557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010108275 + 11010108276.

It is an arithmetic number, because the mean of its divisors is an integer number (11010108276).

Almost surely, 2^22020216551 is an apocalyptic number.

22020216551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020216551 is an equidigital number, since it uses as much as digits as its factorization.

22020216551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 22020216551 its reverse (15561202022), we get a palindrome (37581418573).

The spelling of 22020216551 in words is "twenty-two billion, twenty million, two hundred sixteen thousand, five hundred fifty-one".