23222187 has 16 divisors (see below), whose sum is σ = 36427680. Its totient is φ = 14570496.

The previous prime is 23222179. The next prime is 23222191. The reversal of 23222187 is 78122232.

It is a happy number.

It is not a de Polignac number, because 23222187 - 2³ = 23222179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23222187.

It is not an unprimeable number, because it can be changed into a prime (23222137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24838 + ... + 25755.

It is an arithmetic number, because the mean of its divisors is an integer number (2276730).

Almost surely, 2^23222187 is an apocalyptic number.

23222187 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23222187 is a deficient number, since it is larger than the sum of its proper divisors (13205493).

23222187 is a wasteful number, since it uses less digits than its factorization.

23222187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50619 (or 50613 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 23222187 is about 4818.9404437075. The cubic root of 23222187 is about 285.2995189073.

It can be divided in two parts, 23222 and 187, that added together give a square (23409 = 153²).

The spelling of 23222187 in words is "twenty-three million, two hundred twenty-two thousand, one hundred eighty-seven".