1223313551 has 2 divisors, whose sum is σ = 1223313552. Its totient is φ = 1223313550.

The previous prime is 1223313527. The next prime is 1223313571. The reversal of 1223313551 is 1553133221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223313551 - 2¹⁰ = 1223312527 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223313551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223313571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611656775 + 611656776.

It is an arithmetic number, because the mean of its divisors is an integer number (611656776).

Almost surely, 2^1223313551 is an apocalyptic number.

1223313551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223313551 is an equidigital number, since it uses as much as digits as its factorization.

1223313551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 1223313551 is about 34975.8995738494. The cubic root of 1223313551 is about 1069.4962402870.

Adding to 1223313551 its reverse (1553133221), we get a palindrome (2776446772).

The spelling of 1223313551 in words is "one billion, two hundred twenty-three million, three hundred thirteen thousand, five hundred fifty-one".