22312205 has 16 divisors (see below), whose sum is σ = 27468720. Its totient is φ = 17392128.

The previous prime is 22312193. The next prime is 22312217. The reversal of 22312205 is 50221322.

It is an interprime number because it is at equal distance from previous prime (22312193) and next prime (22312217).

It can be written as a sum of positive squares in 8 ways, for example, as 6543364 + 15768841 = 2558^2 + 3971^2 .

It is a cyclic number.

It is not a de Polignac number, because 22312205 - 2¹⁴ = 22295821 is a prime.

It is a super-3 number, since 3×22312205³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71129 + ... + 71441.

It is an arithmetic number, because the mean of its divisors is an integer number (1716795).

Almost surely, 2^22312205 is an apocalyptic number.

It is an amenable number.

22312205 is a deficient number, since it is larger than the sum of its proper divisors (5156515).

22312205 is a wasteful number, since it uses less digits than its factorization.

22312205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22312205 is about 4723.5796807083. The cubic root of 22312205 is about 281.5231827976.

Adding to 22312205 its reverse (50221322), we get a palindrome (72533527).

The spelling of 22312205 in words is "twenty-two million, three hundred twelve thousand, two hundred five".