16212226256525 has 12 divisors (see below), whose sum is σ = 21649557524532. Its totient is φ = 11972105543040.

The previous prime is 16212226256491. The next prime is 16212226256581. The reversal of 16212226256525 is 52565262221261.

It can be written as a sum of positive squares in 6 ways, for example, as 2619237980836 + 13592988275689 = 1618406^2 + 3686867^2 .

It is not a de Polignac number, because 16212226256525 - 2⁸ = 16212226256269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16212226256525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24941886224 + ... + 24941886873.

It is an arithmetic number, because the mean of its divisors is an integer number (1804129793711).

Almost surely, 2^{16212226256525} is an apocalyptic number.

It is an amenable number.

16212226256525 is a deficient number, since it is larger than the sum of its proper divisors (5437331268007).

16212226256525 is a wasteful number, since it uses less digits than its factorization.

16212226256525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49883773120 (or 49883773115 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 47.

Adding to 16212226256525 its reverse (52565262221261), we get a palindrome (68777488477786).

The spelling of 16212226256525 in words is "sixteen trillion, two hundred twelve billion, two hundred twenty-six million, two hundred fifty-six thousand, five hundred twenty-five".