22212245 has 16 divisors (see below), whose sum is σ = 29211840. Its totient is φ = 16080000.

The previous prime is 22212233. The next prime is 22212257. The reversal of 22212245 is 54221222.

22212245 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (22212233) and next prime (22212257).

It is not a de Polignac number, because 22212245 - 2¹⁸ = 21950101 is a prime.

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, 13001 + ... + 14609.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^22212245 is an apocalyptic number.

It is an amenable number.

22212245 is a deficient number, since it is larger than the sum of its proper divisors (6999595).

22212245 is a wasteful number, since it uses less digits than its factorization.

22212245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876.

The product of its digits is 640, while the sum is 20.

The square root of 22212245 is about 4712.9868448787. The cubic root of 22212245 is about 281.1021398931.

Adding to 22212245 its reverse (54221222), we get a palindrome (76433467).

The spelling of 22212245 in words is "twenty-two million, two hundred twelve thousand, two hundred forty-five".