22155100505 has 16 divisors (see below), whose sum is σ = 27240570000. Its totient is φ = 17287971840.

The previous prime is 22155100477. The next prime is 22155100523. The reversal of 22155100505 is 50500155122.

It can be written as a sum of positive squares in 8 ways, for example, as 10710594064 + 11444506441 = 103492^2 + 106979^2 .

It is not a de Polignac number, because 22155100505 - 2⁸ = 22155100249 is a prime.

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, 1239371 + ... + 1257119.

It is an arithmetic number, because the mean of its divisors is an integer number (1702535625).

Almost surely, 2^22155100505 is an apocalyptic number.

It is an amenable number.

22155100505 is a deficient number, since it is larger than the sum of its proper divisors (5085469495).

22155100505 is a wasteful number, since it uses less digits than its factorization.

22155100505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23884.

The product of its (nonzero) digits is 2500, while the sum is 26.

Adding to 22155100505 its reverse (50500155122), we get a palindrome (72655255627).

The spelling of 22155100505 in words is "twenty-two billion, one hundred fifty-five million, one hundred thousand, five hundred five".