13222651 has 32 divisors (see below), whose sum is σ = 16450560. Its totient is φ = 10492416.

The previous prime is 13222639. The next prime is 13222661. The reversal of 13222651 is 15622231.

It is a cyclic number.

It is not a de Polignac number, because 13222651 - 2⁵ = 13222619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13222621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197320 + ... + 197386.

It is an arithmetic number, because the mean of its divisors is an integer number (514080).

Almost surely, 2^13222651 is an apocalyptic number.

13222651 is a deficient number, since it is larger than the sum of its proper divisors (3227909).

13222651 is a wasteful number, since it uses less digits than its factorization.

13222651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163.

The product of its digits is 720, while the sum is 22.

The square root of 13222651 is about 3636.2963300589. The cubic root of 13222651 is about 236.4682542123.

Adding to 13222651 its reverse (15622231), we get a palindrome (28844882).

The spelling of 13222651 in words is "thirteen million, two hundred twenty-two thousand, six hundred fifty-one".