13243431 has 8 divisors (see below), whose sum is σ = 17829760. Its totient is φ = 8743032.

The previous prime is 13243429. The next prime is 13243453. The reversal of 13243431 is 13434231.

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

It is not a de Polignac number, because 13243431 - 2¹ = 13243429 is a prime.

It is a super-2 number, since 2×13243431² = 350776929303522, 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 = 13243398 and 13243407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21121 + ... + 21738.

It is an arithmetic number, because the mean of its divisors is an integer number (2228720).

Almost surely, 2^13243431 is an apocalyptic number.

13243431 is a deficient number, since it is larger than the sum of its proper divisors (4586329).

13243431 is a wasteful number, since it uses less digits than its factorization.

13243431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42965.

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

The square root of 13243431 is about 3639.1525112312. The cubic root of 13243431 is about 236.5920629320.

Adding to 13243431 its reverse (13434231), we get a palindrome (26677662).

The spelling of 13243431 in words is "thirteen million, two hundred forty-three thousand, four hundred thirty-one".