13224531 has 16 divisors (see below), whose sum is σ = 18275328. Its totient is φ = 8500800.

The previous prime is 13224499. The next prime is 13224539. The reversal of 13224531 is 13542231.

13224531 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13224531 - 2⁵ = 13224499 is a prime.

It is a super-2 number, since 2×13224531² = 349776440339922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13224498 and 13224507.

It is not an unprimeable number, because it can be changed into a prime (13224539) 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, 9351 + ... + 10671.

It is an arithmetic number, because the mean of its divisors is an integer number (1142208).

Almost surely, 2^13224531 is an apocalyptic number.

13224531 is a deficient number, since it is larger than the sum of its proper divisors (5050797).

13224531 is a wasteful number, since it uses less digits than its factorization.

13224531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 720, while the sum is 21.

The square root of 13224531 is about 3636.5548256557. The cubic root of 13224531 is about 236.4794607208.

Adding to 13224531 its reverse (13542231), we get a palindrome (26766762).

The spelling of 13224531 in words is "thirteen million, two hundred twenty-four thousand, five hundred thirty-one".