22231440641 has 2 divisors, whose sum is σ = 22231440642. Its totient is φ = 22231440640.

The previous prime is 22231440631. The next prime is 22231440653. The reversal of 22231440641 is 14604413222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12245635600 + 9985805041 = 110660^2 + 99929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22231440641 is a prime.

It is not a weakly prime, because it can be changed into another prime (22231440631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115720320 + 11115720321.

It is an arithmetic number, because the mean of its divisors is an integer number (11115720321).

Almost surely, 2^22231440641 is an apocalyptic number.

It is an amenable number.

22231440641 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231440641 is an equidigital number, since it uses as much as digits as its factorization.

22231440641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 22231440641 its reverse (14604413222), we get a palindrome (36835853863).

The spelling of 22231440641 in words is "twenty-two billion, two hundred thirty-one million, four hundred forty thousand, six hundred forty-one".