22401505 has 8 divisors (see below), whose sum is σ = 30722112. Its totient is φ = 15361008.

The previous prime is 22401493. The next prime is 22401521. The reversal of 22401505 is 50510422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22401505 - 2⁵ = 22401473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 319987 + ... + 320056.

It is an arithmetic number, because the mean of its divisors is an integer number (3840264).

Almost surely, 2^22401505 is an apocalyptic number.

It is an amenable number.

22401505 is a deficient number, since it is larger than the sum of its proper divisors (8320607).

22401505 is an equidigital number, since it uses as much as digits as its factorization.

22401505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640055.

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

The square root of 22401505 is about 4733.0228184533. The cubic root of 22401505 is about 281.8982623463.

Adding to 22401505 its reverse (50510422), we get a palindrome (72911927).

The spelling of 22401505 in words is "twenty-two million, four hundred one thousand, five hundred five".