13192221 has 24 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 7093632.

The previous prime is 13192217. The next prime is 13192229. The reversal of 13192221 is 12229131.

It is not a de Polignac number, because 13192221 - 2² = 13192217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13192229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^13192221 is an apocalyptic number.

It is an amenable number.

13192221 is a deficient number, since it is larger than the sum of its proper divisors (8476899).

13192221 is a wasteful number, since it uses less digits than its factorization.

13192221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313 (or 5306 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 13192221 is about 3632.1097175058. The cubic root of 13192221 is about 236.2867158300.

The spelling of 13192221 in words is "thirteen million, one hundred ninety-two thousand, two hundred twenty-one".