12722231 has 4 divisors (see below), whose sum is σ = 12815232. Its totient is φ = 12629232.

The previous prime is 12722219. The next prime is 12722233. The reversal of 12722231 is 13222721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13222721 = 3499 ⋅3779.

It is a cyclic number.

It is not a de Polignac number, because 12722231 - 2⁶ = 12722167 is a prime.

It is a super-2 number, since 2×12722231² = 323710323234722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12722233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46295 + ... + 46568.

It is an arithmetic number, because the mean of its divisors is an integer number (3203808).

Almost surely, 2^12722231 is an apocalyptic number.

12722231 is a deficient number, since it is larger than the sum of its proper divisors (93001).

12722231 is an equidigital number, since it uses as much as digits as its factorization.

12722231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93000.

The product of its digits is 336, while the sum is 20.

The square root of 12722231 is about 3566.8236569811. The cubic root of 12722231 is about 233.4467106604.

Adding to 12722231 its reverse (13222721), we get a palindrome (25944952).

The spelling of 12722231 in words is "twelve million, seven hundred twenty-two thousand, two hundred thirty-one".