22420422251 has 2 divisors, whose sum is σ = 22420422252. Its totient is φ = 22420422250.

The previous prime is 22420422217. The next prime is 22420422253. The reversal of 22420422251 is 15222402422.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22420422251 - 2⁶ = 22420422187 is a prime.

Together with 22420422253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22420422251.

It is not a weakly prime, because it can be changed into another prime (22420422253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210211125 + 11210211126.

It is an arithmetic number, because the mean of its divisors is an integer number (11210211126).

Almost surely, 2^22420422251 is an apocalyptic number.

22420422251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22420422251 is an equidigital number, since it uses as much as digits as its factorization.

22420422251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 22420422251 its reverse (15222402422), we get a palindrome (37642824673).

The spelling of 22420422251 in words is "twenty-two billion, four hundred twenty million, four hundred twenty-two thousand, two hundred fifty-one".