22512113405 has 16 divisors (see below), whose sum is σ = 28695045744. Its totient is φ = 16896122880.

The previous prime is 22512113401. The next prime is 22512113413. The reversal of 22512113405 is 50431121522.

It can be written as a sum of positive squares in 8 ways, for example, as 120582361 + 22391531044 = 10981^2 + 149638^2 .

It is not a de Polignac number, because 22512113405 - 2² = 22512113401 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 (22512113401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396476 + ... + 449685.

It is an arithmetic number, because the mean of its divisors is an integer number (1793440359).

Almost surely, 2^22512113405 is an apocalyptic number.

It is an amenable number.

22512113405 is a deficient number, since it is larger than the sum of its proper divisors (6182932339).

22512113405 is a wasteful number, since it uses less digits than its factorization.

22512113405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846496.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 22512113405 its reverse (50431121522), we get a palindrome (72943234927).

The spelling of 22512113405 in words is "twenty-two billion, five hundred twelve million, one hundred thirteen thousand, four hundred five".