21622607 has 2 divisors, whose sum is σ = 21622608. Its totient is φ = 21622606.

The previous prime is 21622591. The next prime is 21622613. The reversal of 21622607 is 70622612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21622607 - 2⁴ = 21622591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21622907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10811303 + 10811304.

It is an arithmetic number, because the mean of its divisors is an integer number (10811304).

Almost surely, 2^21622607 is an apocalyptic number.

21622607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21622607 is an equidigital number, since it uses as much as digits as its factorization.

21622607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 21622607 is about 4650.0115053621. The cubic root of 21622607 is about 278.5924557685.

The spelling of 21622607 in words is "twenty-one million, six hundred twenty-two thousand, six hundred seven".