1226355511 has 2 divisors, whose sum is σ = 1226355512. Its totient is φ = 1226355510.

The previous prime is 1226355497. The next prime is 1226355517. The reversal of 1226355511 is 1155536221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1226355511 - 2²³ = 1217966903 is a prime.

It is a super-2 number, since 2×1226355511² = 3007895678720142242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226355517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613177755 + 613177756.

It is an arithmetic number, because the mean of its divisors is an integer number (613177756).

Almost surely, 2^1226355511 is an apocalyptic number.

1226355511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226355511 is an equidigital number, since it uses as much as digits as its factorization.

1226355511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 1226355511 is about 35019.3590889382. The cubic root of 1226355511 is about 1070.3819962551.

The spelling of 1226355511 in words is "one billion, two hundred twenty-six million, three hundred fifty-five thousand, five hundred eleven".