22161743 has 4 divisors (see below), whose sum is σ = 22321320. Its totient is φ = 22002168.

The previous prime is 22161721. The next prime is 22161751. The reversal of 22161743 is 34716122.

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 22161743 - 2⁶ = 22161679 is a prime.

It is a super-2 number, since 2×22161743² = 982285705596098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22161703) 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, 79580 + ... + 79857.

It is an arithmetic number, because the mean of its divisors is an integer number (5580330).

Almost surely, 2^22161743 is an apocalyptic number.

22161743 is a deficient number, since it is larger than the sum of its proper divisors (159577).

22161743 is a wasteful number, since it uses less digits than its factorization.

22161743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159576.

The product of its digits is 2016, while the sum is 26.

The square root of 22161743 is about 4707.6260471707. The cubic root of 22161743 is about 280.8889392797. Note that the first 3 decimals are identical.

Adding to 22161743 its reverse (34716122), we get a palindrome (56877865).

The spelling of 22161743 in words is "twenty-two million, one hundred sixty-one thousand, seven hundred forty-three".