22651215 has 16 divisors (see below), whose sum is σ = 37222368. Its totient is φ = 11753856.

The previous prime is 22651207. The next prime is 22651217. The reversal of 22651215 is 51215622.

It is a happy number.

It is not a de Polignac number, because 22651215 - 2³ = 22651207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22651217) 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, 19852 + ... + 20961.

It is an arithmetic number, because the mean of its divisors is an integer number (2326398).

Almost surely, 2^22651215 is an apocalyptic number.

22651215 is a deficient number, since it is larger than the sum of its proper divisors (14571153).

22651215 is a wasteful number, since it uses less digits than its factorization.

22651215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40858.

The product of its digits is 1200, while the sum is 24.

The square root of 22651215 is about 4759.3292594650. The cubic root of 22651215 is about 282.9418360740.

Adding to 22651215 its reverse (51215622), we get a palindrome (73866837).

The spelling of 22651215 in words is "twenty-two million, six hundred fifty-one thousand, two hundred fifteen".