16532225 has 18 divisors (see below), whose sum is σ = 21166614. Its totient is φ = 12801600.

The previous prime is 16532179. The next prime is 16532231. The reversal of 16532225 is 52223561.

16532225 = 432² + 433² + ... + 506².

It can be written as a sum of positive squares in 3 ways, for example, as 16129 + 16516096 = 127^2 + 4064^2 .

It is not a de Polignac number, because 16532225 - 2⁶ = 16532161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16532194 and 16532203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 130112 + ... + 130238.

It is an arithmetic number, because the mean of its divisors is an integer number (1175923).

Almost surely, 2^16532225 is an apocalyptic number.

It is an amenable number.

16532225 is a deficient number, since it is larger than the sum of its proper divisors (4634389).

16532225 is an equidigital number, since it uses as much as digits as its factorization.

16532225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 173 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 16532225 is about 4065.9838907699. The cubic root of 16532225 is about 254.7477962676.

Adding to 16532225 its reverse (52223561), we get a palindrome (68755786).

The spelling of 16532225 in words is "sixteen million, five hundred thirty-two thousand, two hundred twenty-five".