22269721 has 2 divisors, whose sum is σ = 22269722. Its totient is φ = 22269720.

The previous prime is 22269719. The next prime is 22269757. The reversal of 22269721 is 12796222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 7485696 = 3845^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 22269721 - 2¹ = 22269719 is a prime.

It is a super-3 number, since 3×22269721³ (a number of 23 digits) contains 333 as substring.

Together with 22269719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22269791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11134860 + 11134861.

It is an arithmetic number, because the mean of its divisors is an integer number (11134861).

Almost surely, 2^22269721 is an apocalyptic number.

It is an amenable number.

22269721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22269721 is an equidigital number, since it uses as much as digits as its factorization.

22269721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 22269721 is about 4719.0805248480. The cubic root of 22269721 is about 281.3443893229.

The spelling of 22269721 in words is "twenty-two million, two hundred sixty-nine thousand, seven hundred twenty-one".