22131052256405 has 8 divisors (see below), whose sum is σ = 26560693481784. Its totient is φ = 17702554622400.

The previous prime is 22131052256381. The next prime is 22131052256459. The reversal of 22131052256405 is 50465225013122.

It can be written as a sum of positive squares in 4 ways, for example, as 270060026929 + 21860992229476 = 519673^2 + 4675574^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22131052256405 - 2⁸ = 22131052256149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285855266 + ... + 285932675.

It is an arithmetic number, because the mean of its divisors is an integer number (3320086685223).

Almost surely, 2^{22131052256405} is an apocalyptic number.

It is an amenable number.

22131052256405 is a deficient number, since it is larger than the sum of its proper divisors (4429641225379).

22131052256405 is an equidigital number, since it uses as much as digits as its factorization.

22131052256405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571795687.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 22131052256405 its reverse (50465225013122), we get a palindrome (72596277269527).

The spelling of 22131052256405 in words is "twenty-two trillion, one hundred thirty-one billion, fifty-two million, two hundred fifty-six thousand, four hundred five".