22040243 has 4 divisors (see below), whose sum is σ = 22267560. Its totient is φ = 21812928.

The previous prime is 22040231. The next prime is 22040267. The reversal of 22040243 is 34204022.

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 22040243 - 2²² = 17845939 is a prime.

It is a super-2 number, since 2×22040243² = 971544622998098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22040273) 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, 113513 + ... + 113706.

It is an arithmetic number, because the mean of its divisors is an integer number (5566890).

Almost surely, 2^22040243 is an apocalyptic number.

22040243 is a deficient number, since it is larger than the sum of its proper divisors (227317).

22040243 is an equidigital number, since it uses as much as digits as its factorization.

22040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227316.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22040243 is about 4694.7037180210. The cubic root of 22040243 is about 280.3746812209.

Adding to 22040243 its reverse (34204022), we get a palindrome (56244265).

The spelling of 22040243 in words is "twenty-two million, forty thousand, two hundred forty-three".