22150215 has 12 divisors (see below), whose sum is σ = 38393784. Its totient is φ = 11813424.

The previous prime is 22150211. The next prime is 22150223. The reversal of 22150215 is 51205122.

It is not a de Polignac number, because 22150215 - 2² = 22150211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22150211) 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, 246069 + ... + 246158.

It is an arithmetic number, because the mean of its divisors is an integer number (3199482).

Almost surely, 2^22150215 is an apocalyptic number.

22150215 is a deficient number, since it is larger than the sum of its proper divisors (16243569).

22150215 is a wasteful number, since it uses less digits than its factorization.

22150215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492238 (or 492235 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 22150215 is about 4706.4014915857. The cubic root of 22150215 is about 280.8402269663.

Adding to 22150215 its reverse (51205122), we get a palindrome (73355337).

The spelling of 22150215 in words is "twenty-two million, one hundred fifty thousand, two hundred fifteen".