22402401 has 16 divisors (see below), whose sum is σ = 34203648. Its totient is φ = 12776400.

The previous prime is 22402399. The next prime is 22402421. The reversal of 22402401 is 10420422.

It is not a de Polignac number, because 22402401 - 2¹ = 22402399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22402421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18546 + ... + 19716.

It is an arithmetic number, because the mean of its divisors is an integer number (2137728).

Almost surely, 2^22402401 is an apocalyptic number.

22402401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22402401 is the 2733-rd octagonal number.

It is an amenable number.

22402401 is a deficient number, since it is larger than the sum of its proper divisors (11801247).

22402401 is a wasteful number, since it uses less digits than its factorization.

22402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22402401 is about 4733.1174716037. The cubic root of 22402401 is about 281.9020206872.

Adding to 22402401 its reverse (10420422), we get a palindrome (32822823).

The spelling of 22402401 in words is "twenty-two million, four hundred two thousand, four hundred one".