22421536 has 12 divisors (see below), whose sum is σ = 44142462. Its totient is φ = 11210752.

The previous prime is 22421513. The next prime is 22421551. The reversal of 22421536 is 63512422.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 4410000 = 4244^2 + 2100^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22421536.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350305 + ... + 350368.

Almost surely, 2^22421536 is an apocalyptic number.

It is an amenable number.

22421536 is a deficient number, since it is larger than the sum of its proper divisors (21720926).

22421536 is an equidigital number, since it uses as much as digits as its factorization.

22421536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700683 (or 700675 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 22421536 is about 4735.1384351463. The cubic root of 22421536 is about 281.9822600044.

Adding to 22421536 its reverse (63512422), we get a palindrome (85933958).

The spelling of 22421536 in words is "twenty-two million, four hundred twenty-one thousand, five hundred thirty-six".