13597222 has 4 divisors (see below), whose sum is σ = 20395836. Its totient is φ = 6798610.

The previous prime is 13597219. The next prime is 13597247. The reversal of 13597222 is 22279531.

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

It is a super-2 number, since 2×13597222² = 369768892234568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3399304 + ... + 3399307.

It is an arithmetic number, because the mean of its divisors is an integer number (5098959).

Almost surely, 2^13597222 is an apocalyptic number.

13597222 is a deficient number, since it is larger than the sum of its proper divisors (6798614).

13597222 is an equidigital number, since it uses as much as digits as its factorization.

13597222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798613.

The product of its digits is 7560, while the sum is 31.

The square root of 13597222 is about 3687.4411181740. The cubic root of 13597222 is about 238.6803848459.

The spelling of 13597222 in words is "thirteen million, five hundred ninety-seven thousand, two hundred twenty-two".