22815072 has 72 divisors (see below), whose sum is σ = 74155536. Its totient is φ = 6518016.

The previous prime is 22815059. The next prime is 22815073. The reversal of 22815072 is 27051822.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22815073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3643 + ... + 7674.

It is an arithmetic number, because the mean of its divisors is an integer number (1029938).

Almost surely, 2^22815072 is an apocalyptic number.

It is an amenable number.

22815072 is an abundant number, since it is smaller than the sum of its proper divisors (51340464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22815072 is a wasteful number, since it uses less digits than its factorization.

22815072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11340 (or 11329 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22815072 is about 4776.5125353128. The cubic root of 22815072 is about 283.6224567325.

Adding to 22815072 its reverse (27051822), we get a palindrome (49866894).

The spelling of 22815072 in words is "twenty-two million, eight hundred fifteen thousand, seventy-two".