22222005 has 32 divisors (see below), whose sum is σ = 38779776. Its totient is φ = 10800384.

The previous prime is 22221977. The next prime is 22222049. The reversal of 22222005 is 50022222.

It is not a de Polignac number, because 22222005 - 2⁵ = 22221973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15499 + ... + 16871.

It is an arithmetic number, because the mean of its divisors is an integer number (1211868).

Almost surely, 2^22222005 is an apocalyptic number.

It is an amenable number.

22222005 is a deficient number, since it is larger than the sum of its proper divisors (16557771).

22222005 is a wasteful number, since it uses less digits than its factorization.

22222005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22222005 is about 4714.0221679581. The cubic root of 22222005 is about 281.1433057027.

Adding to 22222005 its reverse (50022222), we get a palindrome (72244227).

The spelling of 22222005 in words is "twenty-two million, two hundred twenty-two thousand, five".