222530551 has 2 divisors, whose sum is σ = 222530552. Its totient is φ = 222530550.

The previous prime is 222530533. The next prime is 222530563. The reversal of 222530551 is 155035222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222530551 - 2⁷ = 222530423 is a prime.

It is a super-2 number, since 2×222530551² = 99039692256727202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222530531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111265275 + 111265276.

It is an arithmetic number, because the mean of its divisors is an integer number (111265276).

Almost surely, 2^222530551 is an apocalyptic number.

222530551 is a deficient number, since it is larger than the sum of its proper divisors (1).

222530551 is an equidigital number, since it uses as much as digits as its factorization.

222530551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 222530551 is about 14917.4579268721. The cubic root of 222530551 is about 605.9868701022.

Adding to 222530551 its reverse (155035222), we get a palindrome (377565773).

The spelling of 222530551 in words is "two hundred twenty-two million, five hundred thirty thousand, five hundred fifty-one".