22025215 has 4 divisors (see below), whose sum is σ = 26430264. Its totient is φ = 17620168.

The previous prime is 22025207. The next prime is 22025233. The reversal of 22025215 is 51252022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22025215 - 2³ = 22025207 is a prime.

It is a super-2 number, since 2×22025215² = 970220191592450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22025192 and 22025201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202517 + ... + 2202526.

It is an arithmetic number, because the mean of its divisors is an integer number (6607566).

Almost surely, 2^22025215 is an apocalyptic number.

22025215 is a deficient number, since it is larger than the sum of its proper divisors (4405049).

22025215 is an equidigital number, since it uses as much as digits as its factorization.

22025215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405048.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22025215 is about 4693.1029181129. The cubic root of 22025215 is about 280.3109428323.

Adding to 22025215 its reverse (51252022), we get a palindrome (73277237).

The spelling of 22025215 in words is "twenty-two million, twenty-five thousand, two hundred fifteen".