22550401 has 2 divisors, whose sum is σ = 22550402. Its totient is φ = 22550400.

The previous prime is 22550399. The next prime is 22550413. The reversal of 22550401 is 10405522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 1893376 = 4545^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 22550401 - 2¹ = 22550399 is a prime.

Together with 22550399, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1421641 and since 22550401 and 1421641 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22550441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275200 + 11275201.

It is an arithmetic number, because the mean of its divisors is an integer number (11275201).

Almost surely, 2^22550401 is an apocalyptic number.

It is an amenable number.

22550401 is a deficient number, since it is larger than the sum of its proper divisors (1).

22550401 is an equidigital number, since it uses as much as digits as its factorization.

22550401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22550401 is about 4748.7262502696. The cubic root of 22550401 is about 282.5214477151.

Adding to 22550401 its reverse (10405522), we get a palindrome (32955923).

The spelling of 22550401 in words is "twenty-two million, five hundred fifty thousand, four hundred one".