22215104542251 has 16 divisors (see below), whose sum is σ = 32912873881600. Its totient is φ = 14809346142984.

The previous prime is 22215104542247. The next prime is 22215104542283. The reversal of 22215104542251 is 15224540151222.

It is a happy number.

22215104542251 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 5 + 104 + 542 + 2 + 5 + 1 = 666.

It is not a de Polignac number, because 22215104542251 - 2² = 22215104542247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22215104542151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19535491 + ... + 20641356.

It is an arithmetic number, because the mean of its divisors is an integer number (2057054617600).

Almost surely, 2^{22215104542251} is an apocalyptic number.

22215104542251 is a deficient number, since it is larger than the sum of its proper divisors (10697769339349).

22215104542251 is a wasteful number, since it uses less digits than its factorization.

22215104542251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40197335 (or 40197329 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

Adding to 22215104542251 its reverse (15224540151222), we get a palindrome (37439644693473).

The spelling of 22215104542251 in words is "twenty-two trillion, two hundred fifteen billion, one hundred four million, five hundred forty-two thousand, two hundred fifty-one".