22062721 has 2 divisors, whose sum is σ = 22062722. Its totient is φ = 22062720.

The previous prime is 22062713. The next prime is 22062751. The reversal of 22062721 is 12726022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 1132096 = 4575^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 22062721 - 2³ = 22062713 is a prime.

It is a super-3 number, since 3×22062721³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22062692 and 22062701.

It is not a weakly prime, because it can be changed into another prime (22062701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11031360 + 11031361.

It is an arithmetic number, because the mean of its divisors is an integer number (11031361).

Almost surely, 2^22062721 is an apocalyptic number.

It is an amenable number.

22062721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22062721 is an equidigital number, since it uses as much as digits as its factorization.

22062721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 22062721 is about 4697.0970822413. The cubic root of 22062721 is about 280.4699633043.

Adding to 22062721 its reverse (12726022), we get a palindrome (34788743).

The spelling of 22062721 in words is "twenty-two million, sixty-two thousand, seven hundred twenty-one".