1224255511 has 2 divisors, whose sum is σ = 1224255512. Its totient is φ = 1224255510.

The previous prime is 1224255497. The next prime is 1224255517. The reversal of 1224255511 is 1155524221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1224255511 - 2¹¹ = 1224253463 is a prime.

It is a super-2 number, since 2×1224255511² = 2997603112427742242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1224255511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224255517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612127755 + 612127756.

It is an arithmetic number, because the mean of its divisors is an integer number (612127756).

Almost surely, 2^1224255511 is an apocalyptic number.

1224255511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224255511 is an equidigital number, since it uses as much as digits as its factorization.

1224255511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 28.

The square root of 1224255511 is about 34989.3628264363. The cubic root of 1224255511 is about 1069.7706763911.

Adding to 1224255511 its reverse (1155524221), we get a palindrome (2379779732).

The spelling of 1224255511 in words is "one billion, two hundred twenty-four million, two hundred fifty-five thousand, five hundred eleven".