16106216225 has 36 divisors (see below), whose sum is σ = 21971450508. Its totient is φ = 11703436800.

The previous prime is 16106216221. The next prime is 16106216261. The reversal of 16106216225 is 52261260161.

It can be written as a sum of positive squares in 6 ways, for example, as 1135959616 + 14970256609 = 33704^2 + 122353^2 .

It is not a de Polignac number, because 16106216225 - 2² = 16106216221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16106216191 and 16106216200.

It is not an unprimeable number, because it can be changed into a prime (16106216221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6511589 + ... + 6514061.

Almost surely, 2^16106216225 is an apocalyptic number.

It is an amenable number.

16106216225 is a deficient number, since it is larger than the sum of its proper divisors (5865234283).

16106216225 is a wasteful number, since it uses less digits than its factorization.

16106216225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658 (or 4642 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 16106216225 its reverse (52261260161), we get a palindrome (68367476386).

The spelling of 16106216225 in words is "sixteen billion, one hundred six million, two hundred sixteen thousand, two hundred twenty-five".