1123223251 has 2 divisors, whose sum is σ = 1123223252. Its totient is φ = 1123223250.

The previous prime is 1123223221. The next prime is 1123223261. The reversal of 1123223251 is 1523223211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1523223211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123223251 - 2²⁹ = 586352339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123223221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561611625 + 561611626.

It is an arithmetic number, because the mean of its divisors is an integer number (561611626).

Almost surely, 2^1123223251 is an apocalyptic number.

1123223251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123223251 is an equidigital number, since it uses as much as digits as its factorization.

1123223251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 1123223251 is about 33514.5229863115. The cubic root of 1123223251 is about 1039.4940990538.

Adding to 1123223251 its reverse (1523223211), we get a palindrome (2646446462).

The spelling of 1123223251 in words is "one billion, one hundred twenty-three million, two hundred twenty-three thousand, two hundred fifty-one".