22221875 has 24 divisors (see below), whose sum is σ = 29966832. Its totient is φ = 16380000.

The previous prime is 22221853. The next prime is 22221889. The reversal of 22221875 is 57812222.

It is not a de Polignac number, because 22221875 - 2¹⁰ = 22220851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40352 + ... + 40898.

It is an arithmetic number, because the mean of its divisors is an integer number (1248618).

Almost surely, 2^22221875 is an apocalyptic number.

22221875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22221875 is a deficient number, since it is larger than the sum of its proper divisors (7744957).

22221875 is an frugal number, since it uses more digits than its factorization.

22221875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 565 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 22221875 is about 4714.0083792883. The cubic root of 22221875 is about 281.1427574668.

It can be divided in two parts, 22 and 221875, that multiplied together give a triangular number (4881250 = T₃₁₂₄).

The spelling of 22221875 in words is "twenty-two million, two hundred twenty-one thousand, eight hundred seventy-five".