22040231 has 2 divisors, whose sum is σ = 22040232. Its totient is φ = 22040230.

The previous prime is 22040219. The next prime is 22040267. The reversal of 22040231 is 13204022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22040231 - 2⁶ = 22040167 is a prime.

It is a super-2 number, since 2×22040231² = 971543565066722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22040281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11020115 + 11020116.

It is an arithmetic number, because the mean of its divisors is an integer number (11020116).

Almost surely, 2^22040231 is an apocalyptic number.

22040231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22040231 is an equidigital number, since it uses as much as digits as its factorization.

22040231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22040231 is about 4694.7024399849. The cubic root of 22040231 is about 280.3746303367.

Adding to 22040231 its reverse (13204022), we get a palindrome (35244253).

The spelling of 22040231 in words is "twenty-two million, forty thousand, two hundred thirty-one".