12223231555 has 4 divisors (see below), whose sum is σ = 14667877872. Its totient is φ = 9778585240.

The previous prime is 12223231543. The next prime is 12223231567. The reversal of 12223231555 is 55513232221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55513232221 = 17257 ⋅3216853.

It is an interprime number because it is at equal distance from previous prime (12223231543) and next prime (12223231567).

It is not a de Polignac number, because 12223231555 - 2¹¹ = 12223229507 is a prime.

It is a Duffinian 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, 1222323151 + ... + 1222323160.

It is an arithmetic number, because the mean of its divisors is an integer number (3666969468).

Almost surely, 2^12223231555 is an apocalyptic number.

12223231555 is a deficient number, since it is larger than the sum of its proper divisors (2444646317).

12223231555 is an equidigital number, since it uses as much as digits as its factorization.

12223231555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444646316.

The product of its digits is 18000, while the sum is 31.

Adding to 12223231555 its reverse (55513232221), we get a palindrome (67736463776).

The spelling of 12223231555 in words is "twelve billion, two hundred twenty-three million, two hundred thirty-one thousand, five hundred fifty-five".