22401536 has 20 divisors (see below), whose sum is σ = 44760342. Its totient is φ = 11200512.

The previous prime is 22401527. The next prime is 22401541. The reversal of 22401536 is 63510422.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 3041536 = 4400^2 + 1744^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365 + ... + 22388.

Almost surely, 2^22401536 is an apocalyptic number.

It is an amenable number.

22401536 is a deficient number, since it is larger than the sum of its proper divisors (22358806).

22401536 is an frugal number, since it uses more digits than its factorization.

22401536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43771 (or 43755 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22401536 is about 4733.0260933149. The cubic root of 22401536 is about 281.8983923799.

Adding to 22401536 its reverse (63510422), we get a palindrome (85911958).

The spelling of 22401536 in words is "twenty-two million, four hundred one thousand, five hundred thirty-six".