222425551 has 2 divisors, whose sum is σ = 222425552. Its totient is φ = 222425550.

The previous prime is 222425549. The next prime is 222425587. The reversal of 222425551 is 155524222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222425551 - 2¹ = 222425549 is a prime.

Together with 222425549, 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 (222425531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111212775 + 111212776.

It is an arithmetic number, because the mean of its divisors is an integer number (111212776).

Almost surely, 2^222425551 is an apocalyptic number.

222425551 is a deficient number, since it is larger than the sum of its proper divisors (1).

222425551 is an equidigital number, since it uses as much as digits as its factorization.

222425551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 28.

The square root of 222425551 is about 14913.9381452385. The cubic root of 222425551 is about 605.8915444173.

Adding to 222425551 its reverse (155524222), we get a palindrome (377949773).

The spelling of 222425551 in words is "two hundred twenty-two million, four hundred twenty-five thousand, five hundred fifty-one".