1223203431 has 16 divisors (see below), whose sum is σ = 1738476000. Its totient is φ = 762344448.

The previous prime is 1223203427. The next prime is 1223203433. The reversal of 1223203431 is 1343023221.

It is not a de Polignac number, because 1223203431 - 2² = 1223203427 is a prime.

It is a super-2 number, since 2×1223203431² = 2992453267220343522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223203398 and 1223203407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223203433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72886 + ... + 88083.

It is an arithmetic number, because the mean of its divisors is an integer number (108654750).

Almost surely, 2^1223203431 is an apocalyptic number.

1223203431 is a deficient number, since it is larger than the sum of its proper divisors (515272569).

1223203431 is a wasteful number, since it uses less digits than its factorization.

1223203431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161138.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1223203431 is about 34974.3253115768. The cubic root of 1223203431 is about 1069.4641480896.

Adding to 1223203431 its reverse (1343023221), we get a palindrome (2566226652).

It can be divided in two parts, 122320 and 3431, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 1223203431 in words is "one billion, two hundred twenty-three million, two hundred three thousand, four hundred thirty-one".