22151332205 has 4 divisors (see below), whose sum is σ = 26581598652. Its totient is φ = 17721065760.

The previous prime is 22151332201. The next prime is 22151332207. The reversal of 22151332205 is 50223315122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14787289609 + 7364042596 = 121603^2 + 85814^2 .

It is not a de Polignac number, because 22151332205 - 2² = 22151332201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151332201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215133216 + ... + 2215133225.

It is an arithmetic number, because the mean of its divisors is an integer number (6645399663).

Almost surely, 2^22151332205 is an apocalyptic number.

It is an amenable number.

22151332205 is a deficient number, since it is larger than the sum of its proper divisors (4430266447).

22151332205 is an equidigital number, since it uses as much as digits as its factorization.

22151332205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430266446.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 22151332205 its reverse (50223315122), we get a palindrome (72374647327).

The spelling of 22151332205 in words is "twenty-two billion, one hundred fifty-one million, three hundred thirty-two thousand, two hundred five".