22971197 has 4 divisors (see below), whose sum is σ = 23347836. Its totient is φ = 22594560.

The previous prime is 22971187. The next prime is 22971211. The reversal of 22971197 is 79117922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8916196 + 14055001 = 2986^2 + 3749^2 .

It is a cyclic number.

It is not a de Polignac number, because 22971197 - 2¹⁶ = 22905661 is a prime.

It is a super-2 number, since 2×22971197² = 1055351783225618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22971197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22971107) 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, 188228 + ... + 188349.

It is an arithmetic number, because the mean of its divisors is an integer number (5836959).

Almost surely, 2^22971197 is an apocalyptic number.

It is an amenable number.

22971197 is a deficient number, since it is larger than the sum of its proper divisors (376639).

22971197 is an equidigital number, since it uses as much as digits as its factorization.

22971197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376638.

The product of its digits is 15876, while the sum is 38.

The square root of 22971197 is about 4792.8276622470. The cubic root of 22971197 is about 284.2679354963.

The spelling of 22971197 in words is "twenty-two million, nine hundred seventy-one thousand, one hundred ninety-seven".