1223023231 has 4 divisors (see below), whose sum is σ = 1294965792. Its totient is φ = 1151080672.

The previous prime is 1223023201. The next prime is 1223023247. The reversal of 1223023231 is 1323203221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323203221 = 127 ⋅10418923.

It is a cyclic number.

It is not a de Polignac number, because 1223023231 - 2⁵ = 1223023199 is a prime.

It is a super-2 number, since 2×1223023231² = 2991571647131358722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223023199 and 1223023208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223023201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35971255 + ... + 35971288.

It is an arithmetic number, because the mean of its divisors is an integer number (323741448).

Almost surely, 2^1223023231 is an apocalyptic number.

1223023231 is a deficient number, since it is larger than the sum of its proper divisors (71942561).

1223023231 is an equidigital number, since it uses as much as digits as its factorization.

1223023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71942560.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1223023231 is about 34971.7490411904. The cubic root of 1223023231 is about 1069.4116283699.

Adding to 1223023231 its reverse (1323203221), we get a palindrome (2546226452).

The spelling of 1223023231 in words is "one billion, two hundred twenty-three million, twenty-three thousand, two hundred thirty-one".