22143697 has 4 divisors (see below), whose sum is σ = 22290496. Its totient is φ = 21996900.

The previous prime is 22143689. The next prime is 22143743. The reversal of 22143697 is 79634122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22143697 - 2³ = 22143689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22143637) 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, 73173 + ... + 73474.

It is an arithmetic number, because the mean of its divisors is an integer number (5572624).

Almost surely, 2^22143697 is an apocalyptic number.

It is an amenable number.

22143697 is a deficient number, since it is larger than the sum of its proper divisors (146799).

22143697 is a wasteful number, since it uses less digits than its factorization.

22143697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146798.

The product of its digits is 18144, while the sum is 34.

The square root of 22143697 is about 4705.7089795269. The cubic root of 22143697 is about 280.8126772536.

The spelling of 22143697 in words is "twenty-two million, one hundred forty-three thousand, six hundred ninety-seven".