1223131451 has 2 divisors, whose sum is σ = 1223131452. Its totient is φ = 1223131450.

The previous prime is 1223131447. The next prime is 1223131457. The reversal of 1223131451 is 1541313221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223131451 - 2² = 1223131447 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223131457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611565725 + 611565726.

It is an arithmetic number, because the mean of its divisors is an integer number (611565726).

Almost surely, 2^1223131451 is an apocalyptic number.

1223131451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223131451 is an equidigital number, since it uses as much as digits as its factorization.

1223131451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 1223131451 is about 34973.2962558578. The cubic root of 1223131451 is about 1069.4431699657.

Adding to 1223131451 its reverse (1541313221), we get a palindrome (2764444672).

The spelling of 1223131451 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, four hundred fifty-one".