22197143 has 4 divisors (see below), whose sum is σ = 22234800. Its totient is φ = 22159488.

The previous prime is 22197127. The next prime is 22197163. The reversal of 22197143 is 34179122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34179122 = 2 ⋅17089561.

It is a cyclic number.

It is not a de Polignac number, because 22197143 - 2⁴ = 22197127 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 (22197163) 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, 17930 + ... + 19127.

It is an arithmetic number, because the mean of its divisors is an integer number (5558700).

Almost surely, 2^22197143 is an apocalyptic number.

22197143 is a deficient number, since it is larger than the sum of its proper divisors (37657).

22197143 is an equidigital number, since it uses as much as digits as its factorization.

22197143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37656.

The product of its digits is 3024, while the sum is 29.

The square root of 22197143 is about 4711.3844037607. The cubic root of 22197143 is about 281.0384187792.

The spelling of 22197143 in words is "twenty-two million, one hundred ninety-seven thousand, one hundred forty-three".