22215743 has 4 divisors (see below), whose sum is σ = 24235368. Its totient is φ = 20196120.

The previous prime is 22215737. The next prime is 22215757. The reversal of 22215743 is 34751222.

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 22215743 - 2¹⁰ = 22214719 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 (22218743) 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, 1009796 + ... + 1009817.

It is an arithmetic number, because the mean of its divisors is an integer number (6058842).

Almost surely, 2^22215743 is an apocalyptic number.

22215743 is a deficient number, since it is larger than the sum of its proper divisors (2019625).

22215743 is a wasteful number, since it uses less digits than its factorization.

22215743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019624.

The product of its digits is 3360, while the sum is 26.

The square root of 22215743 is about 4713.3579325148. The cubic root of 22215743 is about 281.1168951729.

Adding to 22215743 its reverse (34751222), we get a palindrome (56966965).

The spelling of 22215743 in words is "twenty-two million, two hundred fifteen thousand, seven hundred forty-three".