16201225 has 12 divisors (see below), whose sum is σ = 20180380. Its totient is φ = 12902400.

The previous prime is 16201219. The next prime is 16201247. The reversal of 16201225 is 52210261.

It can be written as a sum of positive squares in 6 ways, for example, as 1478656 + 14722569 = 1216^2 + 3837^2 .

It is not a de Polignac number, because 16201225 - 2⁹ = 16200713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4681 + ... + 7369.

Almost surely, 2^16201225 is an apocalyptic number.

It is an amenable number.

16201225 is a deficient number, since it is larger than the sum of its proper divisors (3979155).

16201225 is a wasteful number, since it uses less digits than its factorization.

16201225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940 (or 2935 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16201225 is about 4025.0745334714. The cubic root of 16201225 is about 253.0361772385.

Adding to 16201225 its reverse (52210261), we get a palindrome (68411486).

The spelling of 16201225 in words is "sixteen million, two hundred one thousand, two hundred twenty-five".