22215143 has 4 divisors (see below), whose sum is σ = 22430928. Its totient is φ = 21999360.

The previous prime is 22215101. The next prime is 22215157. The reversal of 22215143 is 34151222.

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 22215143 - 2¹² = 22211047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115143) 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, 107738 + ... + 107943.

It is an arithmetic number, because the mean of its divisors is an integer number (5607732).

Almost surely, 2^22215143 is an apocalyptic number.

22215143 is a deficient number, since it is larger than the sum of its proper divisors (215785).

22215143 is a wasteful number, since it uses less digits than its factorization.

22215143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215784.

The product of its digits is 480, while the sum is 20.

The square root of 22215143 is about 4713.2942831951. The cubic root of 22215143 is about 281.1143643602.

Adding to 22215143 its reverse (34151222), we get a palindrome (56366365).

The spelling of 22215143 in words is "twenty-two million, two hundred fifteen thousand, one hundred forty-three".