22154143 has 4 divisors (see below), whose sum is σ = 24168168. Its totient is φ = 20140120.

The previous prime is 22154137. The next prime is 22154177. The reversal of 22154143 is 34145122.

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

It is a de Polignac number, because none of the positive numbers 2^k-22154143 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 (22155143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006996 + ... + 1007017.

It is an arithmetic number, because the mean of its divisors is an integer number (6042042).

Almost surely, 2^22154143 is an apocalyptic number.

22154143 is a deficient number, since it is larger than the sum of its proper divisors (2014025).

22154143 is a wasteful number, since it uses less digits than its factorization.

22154143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014024.

The product of its digits is 960, while the sum is 22.

The square root of 22154143 is about 4706.8187770510. The cubic root of 22154143 is about 280.8568268836.

Adding to 22154143 its reverse (34145122), we get a palindrome (56299265).

The spelling of 22154143 in words is "twenty-two million, one hundred fifty-four thousand, one hundred forty-three".