22142621 has 2 divisors, whose sum is σ = 22142622. Its totient is φ = 22142620.

The previous prime is 22142609. The next prime is 22142647. The reversal of 22142621 is 12624122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14364100 + 7778521 = 3790^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 22142621 - 2²² = 17948317 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22142593 and 22142602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22142651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11071310 + 11071311.

It is an arithmetic number, because the mean of its divisors is an integer number (11071311).

Almost surely, 2^22142621 is an apocalyptic number.

It is an amenable number.

22142621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22142621 is an equidigital number, since it uses as much as digits as its factorization.

22142621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 22142621 is about 4705.5946489259. The cubic root of 22142621 is about 280.8081287910.

Adding to 22142621 its reverse (12624122), we get a palindrome (34766743).

The spelling of 22142621 in words is "twenty-two million, one hundred forty-two thousand, six hundred twenty-one".