1223131431 has 32 divisors (see below), whose sum is σ = 1730285568. Its totient is φ = 767622240.

The previous prime is 1223131423. The next prime is 1223131439. The reversal of 1223131431 is 1341313221.

It is an interprime number because it is at equal distance from previous prime (1223131423) and next prime (1223131439).

It is not a de Polignac number, because 1223131431 - 2³ = 1223131423 is a prime.

It is a super-2 number, since 2×1223131431² = 2992100995000215522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223131398 and 1223131407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223131439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 404716 + ... + 407726.

It is an arithmetic number, because the mean of its divisors is an integer number (54071424).

Almost surely, 2^1223131431 is an apocalyptic number.

1223131431 is a deficient number, since it is larger than the sum of its proper divisors (507154137).

1223131431 is a wasteful number, since it uses less digits than its factorization.

1223131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171.

The product of its digits is 432, while the sum is 21.

The square root of 1223131431 is about 34973.2959699254. The cubic root of 1223131431 is about 1069.4431641367.

Adding to 1223131431 its reverse (1341313221), we get a palindrome (2564444652).

The spelling of 1223131431 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, four hundred thirty-one".