16228525 has 6 divisors (see below), whose sum is σ = 20123402. Its totient is φ = 12982800.

The previous prime is 16228519. The next prime is 16228529. The reversal of 16228525 is 52582261.

It can be written as a sum of positive squares in 3 ways, for example, as 212521 + 16016004 = 461^2 + 4002^2 .

It is not a de Polignac number, because 16228525 - 2³ = 16228517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16228529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324546 + ... + 324595.

Almost surely, 2^16228525 is an apocalyptic number.

It is an amenable number.

16228525 is a deficient number, since it is larger than the sum of its proper divisors (3894877).

16228525 is an equidigital number, since it uses as much as digits as its factorization.

16228525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649151 (or 649146 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 16228525 is about 4028.4643476144. The cubic root of 16228525 is about 253.1782243410.

The spelling of 16228525 in words is "sixteen million, two hundred twenty-eight thousand, five hundred twenty-five".