13223431 has 8 divisors (see below), whose sum is σ = 14306544. Its totient is φ = 12149760.

The previous prime is 13223423. The next prime is 13223437. The reversal of 13223431 is 13432231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13223431 - 2³ = 13223423 is a prime.

It is a super-2 number, since 2×13223431² = 349718254823522, 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 = 13223399 and 13223408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711 + ... + 5191.

It is an arithmetic number, because the mean of its divisors is an integer number (1788318).

Almost surely, 2^13223431 is an apocalyptic number.

13223431 is a deficient number, since it is larger than the sum of its proper divisors (1083113).

13223431 is a wasteful number, since it uses less digits than its factorization.

13223431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721.

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

The square root of 13223431 is about 3636.4035804624. The cubic root of 13223431 is about 236.4729038501.

Adding to 13223431 its reverse (13432231), we get a palindrome (26655662).

It can be divided in two parts, 1322 and 3431, that added together give a triangular number (4753 = T₉₇).

The spelling of 13223431 in words is "thirteen million, two hundred twenty-three thousand, four hundred thirty-one".