13221597 has 16 divisors (see below), whose sum is σ = 19103040. Its totient is φ = 8101632.

The previous prime is 13221583. The next prime is 13221599. The reversal of 13221597 is 79512231.

It is not a de Polignac number, because 13221597 - 2⁴ = 13221581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221599) 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, 822 + ... + 5207.

It is an arithmetic number, because the mean of its divisors is an integer number (1193940).

Almost surely, 2^13221597 is an apocalyptic number.

13221597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13221597 is a deficient number, since it is larger than the sum of its proper divisors (5881443).

13221597 is a wasteful number, since it uses less digits than its factorization.

13221597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6092.

The product of its digits is 3780, while the sum is 30.

The square root of 13221597 is about 3636.1513994882. The cubic root of 13221597 is about 236.4619709498.

The spelling of 13221597 in words is "thirteen million, two hundred twenty-one thousand, five hundred ninety-seven".