22646401 has 2 divisors, whose sum is σ = 22646402. Its totient is φ = 22646400.

The previous prime is 22646381. The next prime is 22646411. The reversal of 22646401 is 10464622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19492225 + 3154176 = 4415^2 + 1776^2 .

It is a cyclic number.

It is not a de Polignac number, because 22646401 - 2¹⁷ = 22515329 is a prime.

It is not a weakly prime, because it can be changed into another prime (22646411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11323200 + 11323201.

It is an arithmetic number, because the mean of its divisors is an integer number (11323201).

Almost surely, 2^22646401 is an apocalyptic number.

It is an amenable number.

22646401 is a deficient number, since it is larger than the sum of its proper divisors (1).

22646401 is an equidigital number, since it uses as much as digits as its factorization.

22646401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22646401 is about 4758.8234890569. The cubic root of 22646401 is about 282.9217903722.

The spelling of 22646401 in words is "twenty-two million, six hundred forty-six thousand, four hundred one".