222280649 has 2 divisors, whose sum is σ = 222280650. Its totient is φ = 222280648.

The previous prime is 222280613. The next prime is 222280651. The reversal of 222280649 is 946082222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 29626249 = 13880^2 + 5443^2 .

It is a cyclic number.

It is not a de Polignac number, because 222280649 - 2¹² = 222276553 is a prime.

It is a super-2 number, since 2×222280649² = 98817373839722402, which contains 22 as substring.

Together with 222280651, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (222280549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111140324 + 111140325.

It is an arithmetic number, because the mean of its divisors is an integer number (111140325).

Almost surely, 2^222280649 is an apocalyptic number.

It is an amenable number.

222280649 is a deficient number, since it is larger than the sum of its proper divisors (1).

222280649 is an equidigital number, since it uses as much as digits as its factorization.

222280649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 222280649 is about 14909.0794149069. The cubic root of 222280649 is about 605.7599438763.

The spelling of 222280649 in words is "two hundred twenty-two million, two hundred eighty thousand, six hundred forty-nine".