22411721 has 2 divisors, whose sum is σ = 22411722. Its totient is φ = 22411720.

The previous prime is 22411709. The next prime is 22411757. The reversal of 22411721 is 12711422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 3367225 = 4364^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22411721 - 2¹⁸ = 22149577 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22411693 and 22411702.

It is not a weakly prime, because it can be changed into another prime (22411771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11205860 + 11205861.

It is an arithmetic number, because the mean of its divisors is an integer number (11205861).

Almost surely, 2^22411721 is an apocalyptic number.

It is an amenable number.

22411721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22411721 is an equidigital number, since it uses as much as digits as its factorization.

22411721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 20.

The square root of 22411721 is about 4734.1019211673. The cubic root of 22411721 is about 281.9411082024.

It can be divided in two parts, 22411 and 721, that added together give a palindrome (23132).

The spelling of 22411721 in words is "twenty-two million, four hundred eleven thousand, seven hundred twenty-one".