1223216455 has 4 divisors (see below), whose sum is σ = 1467859752. Its totient is φ = 978573160.

The previous prime is 1223216441. The next prime is 1223216461. The reversal of 1223216455 is 5546123221.

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

It is not a de Polignac number, because 1223216455 - 2⁷ = 1223216327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122321641 + ... + 122321650.

It is an arithmetic number, because the mean of its divisors is an integer number (366964938).

Almost surely, 2^1223216455 is an apocalyptic number.

1223216455 is a deficient number, since it is larger than the sum of its proper divisors (244643297).

1223216455 is an equidigital number, since it uses as much as digits as its factorization.

1223216455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244643296.

The product of its digits is 14400, while the sum is 31.

The square root of 1223216455 is about 34974.5115048088. The cubic root of 1223216455 is about 1069.4679437655.

Adding to 1223216455 its reverse (5546123221), we get a palindrome (6769339676).

The spelling of 1223216455 in words is "one billion, two hundred twenty-three million, two hundred sixteen thousand, four hundred fifty-five".