22125815 has 16 divisors (see below), whose sum is σ = 27451200. Its totient is φ = 17107200.

The previous prime is 22125809. The next prime is 22125821. The reversal of 22125815 is 51852122.

It is an interprime number because it is at equal distance from previous prime (22125809) and next prime (22125821).

It is not a de Polignac number, because 22125815 - 2⁴ = 22125799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36515 + ... + 37115.

It is an arithmetic number, because the mean of its divisors is an integer number (1715700).

Almost surely, 2^22125815 is an apocalyptic number.

22125815 is a deficient number, since it is larger than the sum of its proper divisors (5325385).

22125815 is a wasteful number, since it uses less digits than its factorization.

22125815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 1600, while the sum is 26.

The square root of 22125815 is about 4703.8085632815. The cubic root of 22125815 is about 280.7370674071.

Adding to 22125815 its reverse (51852122), we get a palindrome (73977937).

The spelling of 22125815 in words is "twenty-two million, one hundred twenty-five thousand, eight hundred fifteen".