1223223251 has 4 divisors (see below), whose sum is σ = 1234655352. Its totient is φ = 1211791152.

The previous prime is 1223223247. The next prime is 1223223307. The reversal of 1223223251 is 1523223221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223223251 - 2² = 1223223247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223223241) 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 in 3 ways as a sum of consecutive naturals, for example, 5715890 + ... + 5716103.

It is an arithmetic number, because the mean of its divisors is an integer number (308663838).

Almost surely, 2^1223223251 is an apocalyptic number.

1223223251 is a deficient number, since it is larger than the sum of its proper divisors (11432101).

1223223251 is a wasteful number, since it uses less digits than its factorization.

1223223251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11432100.

The product of its digits is 1440, while the sum is 23.

The square root of 1223223251 is about 34974.6086611416. The cubic root of 1223223251 is about 1069.4699243609.

Adding to 1223223251 its reverse (1523223221), we get a palindrome (2746446472).

The spelling of 1223223251 in words is "one billion, two hundred twenty-three million, two hundred twenty-three thousand, two hundred fifty-one".