22440240461 has 2 divisors, whose sum is σ = 22440240462. Its totient is φ = 22440240460.

The previous prime is 22440240419. The next prime is 22440240517. The reversal of 22440240461 is 16404204422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17429016361 + 5011224100 = 132019^2 + 70790^2 .

It is a cyclic number.

It is not a de Polignac number, because 22440240461 - 2²⁶ = 22373131597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22440240061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220120230 + 11220120231.

It is an arithmetic number, because the mean of its divisors is an integer number (11220120231).

Almost surely, 2^22440240461 is an apocalyptic number.

It is an amenable number.

22440240461 is a deficient number, since it is larger than the sum of its proper divisors (1).

22440240461 is an equidigital number, since it uses as much as digits as its factorization.

22440240461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 22440240461 its reverse (16404204422), we get a palindrome (38844444883).

The spelling of 22440240461 in words is "twenty-two billion, four hundred forty million, two hundred forty thousand, four hundred sixty-one".