1223052251 has 4 divisors (see below), whose sum is σ = 1223359992. Its totient is φ = 1222744512.

The previous prime is 1223052217. The next prime is 1223052277. The reversal of 1223052251 is 1522503221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1522503221 = 17 ⋅89559013.

It is a cyclic number.

It is not a de Polignac number, because 1223052251 - 2²⁶ = 1155943387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223072251) 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, 147830 + ... + 155883.

It is an arithmetic number, because the mean of its divisors is an integer number (305839998).

Almost surely, 2^1223052251 is an apocalyptic number.

1223052251 is a deficient number, since it is larger than the sum of its proper divisors (307741).

1223052251 is an equidigital number, since it uses as much as digits as its factorization.

1223052251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307740.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1223052251 is about 34972.1639450578. The cubic root of 1223052251 is about 1069.4200866666.

Adding to 1223052251 its reverse (1522503221), we get a palindrome (2745555472).

The spelling of 1223052251 in words is "one billion, two hundred twenty-three million, fifty-two thousand, two hundred fifty-one".