22162397 has 4 divisors (see below), whose sum is σ = 22183356. Its totient is φ = 22141440.

The previous prime is 22162381. The next prime is 22162429. The reversal of 22162397 is 79326122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79326122 = 2 ⋅39663061.

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 21659716 = 709^2 + 4654^2 .

It is a cyclic number.

It is not a de Polignac number, because 22162397 - 2⁴ = 22162381 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 (22162307) 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, 8804 + ... + 11037.

It is an arithmetic number, because the mean of its divisors is an integer number (5545839).

Almost surely, 2^22162397 is an apocalyptic number.

It is an amenable number.

22162397 is a deficient number, since it is larger than the sum of its proper divisors (20959).

22162397 is a wasteful number, since it uses less digits than its factorization.

22162397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20958.

The product of its digits is 9072, while the sum is 32.

The square root of 22162397 is about 4707.6955084202. The cubic root of 22162397 is about 280.8917022928.

The spelling of 22162397 in words is "twenty-two million, one hundred sixty-two thousand, three hundred ninety-seven".