16220325 has 24 divisors (see below), whose sum is σ = 29257056. Its totient is φ = 7864000.

The previous prime is 16220287. The next prime is 16220371. The reversal of 16220325 is 52302261.

16220325 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16220325 - 2⁸ = 16220069 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9006 + ... + 10655.

It is an arithmetic number, because the mean of its divisors is an integer number (1219044).

Almost surely, 2^16220325 is an apocalyptic number.

16220325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16220325 is a deficient number, since it is larger than the sum of its proper divisors (13036731).

16220325 is a wasteful number, since it uses less digits than its factorization.

16220325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685 (or 19680 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 16220325 is about 4027.4464614691. The cubic root of 16220325 is about 253.1355749278.

Adding to 16220325 its reverse (52302261), we get a palindrome (68522586).

The spelling of 16220325 in words is "sixteen million, two hundred twenty thousand, three hundred twenty-five".