222144451 has 2 divisors, whose sum is σ = 222144452. Its totient is φ = 222144450.

The previous prime is 222144443. The next prime is 222144469. The reversal of 222144451 is 154441222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222144451 - 2³ = 222144443 is a prime.

It is a super-2 number, since 2×222144451² = 98696314220182802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222144421) 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, 111072225 + 111072226.

It is an arithmetic number, because the mean of its divisors is an integer number (111072226).

Almost surely, 2^222144451 is an apocalyptic number.

222144451 is the 6666-th centered decagonal number.

222144451 is a deficient number, since it is larger than the sum of its proper divisors (1).

222144451 is an equidigital number, since it uses as much as digits as its factorization.

222144451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 25.

The square root of 222144451 is about 14904.5110956381. The cubic root of 222144451 is about 605.6361961881.

Adding to 222144451 its reverse (154441222), we get a palindrome (376585673).

The spelling of 222144451 in words is "two hundred twenty-two million, one hundred forty-four thousand, four hundred fifty-one".