13122231 has 4 divisors (see below), whose sum is σ = 17496312. Its totient is φ = 8748152.

The previous prime is 13122229. The next prime is 13122247. The reversal of 13122231 is 13222131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13122231 - 2¹ = 13122229 is a prime.

It is a super-2 number, since 2×13122231² = 344385892834722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187036 + ... + 2187041.

It is an arithmetic number, because the mean of its divisors is an integer number (4374078).

Almost surely, 2^13122231 is an apocalyptic number.

13122231 is a deficient number, since it is larger than the sum of its proper divisors (4374081).

13122231 is an equidigital number, since it uses as much as digits as its factorization.

13122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374080.

The product of its digits is 72, while the sum is 15.

The square root of 13122231 is about 3622.4620080823. The cubic root of 13122231 is about 235.8681095385.

Adding to 13122231 its reverse (13222131), we get a palindrome (26344362).

The spelling of 13122231 in words is "thirteen million, one hundred twenty-two thousand, two hundred thirty-one".