22013597 has 4 divisors (see below), whose sum is σ = 22550556. Its totient is φ = 21476640.

The previous prime is 22013591. The next prime is 22013611. The reversal of 22013597 is 79531022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79531022 = 2 ⋅39765511.

It can be written as a sum of positive squares in 2 ways, for example, as 11215801 + 10797796 = 3349^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013597 - 2²² = 17819293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013591) 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, 268418 + ... + 268499.

It is an arithmetic number, because the mean of its divisors is an integer number (5637639).

Almost surely, 2^22013597 is an apocalyptic number.

It is an amenable number.

22013597 is a deficient number, since it is larger than the sum of its proper divisors (536959).

22013597 is an equidigital number, since it uses as much as digits as its factorization.

22013597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536958.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 22013597 is about 4691.8649810070. The cubic root of 22013597 is about 280.2616474329.

The spelling of 22013597 in words is "twenty-two million, thirteen thousand, five hundred ninety-seven".