22685143 has 4 divisors (see below), whose sum is σ = 24430168. Its totient is φ = 20940120.

The previous prime is 22685137. The next prime is 22685147. The reversal of 22685143 is 34158622.

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

It is a cyclic number.

It is not a de Polignac number, because 22685143 - 2⁹ = 22684631 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 (22685147) 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, 872493 + ... + 872518.

It is an arithmetic number, because the mean of its divisors is an integer number (6107542).

Almost surely, 2^22685143 is an apocalyptic number.

22685143 is a deficient number, since it is larger than the sum of its proper divisors (1745025).

22685143 is a wasteful number, since it uses less digits than its factorization.

22685143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745024.

The product of its digits is 11520, while the sum is 31.

The square root of 22685143 is about 4762.8922935544. The cubic root of 22685143 is about 283.0830332338.

The spelling of 22685143 in words is "twenty-two million, six hundred eighty-five thousand, one hundred forty-three".