16512325 has 6 divisors (see below), whose sum is σ = 20475314. Its totient is φ = 13209840.

The previous prime is 16512319. The next prime is 16512341. The reversal of 16512325 is 52321561.

It can be written as a sum of positive squares in 3 ways, for example, as 4356 + 16507969 = 66^2 + 4063^2 .

It is not a de Polignac number, because 16512325 - 2⁹ = 16511813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 660493 = 16512325 / (1 + 6 + 5 + 1 + 2 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16512325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330222 + ... + 330271.

Almost surely, 2^16512325 is an apocalyptic number.

It is an amenable number.

16512325 is a deficient number, since it is larger than the sum of its proper divisors (3962989).

16512325 is an equidigital number, since it uses as much as digits as its factorization.

16512325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660503 (or 660498 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 16512325 is about 4063.5360217426. The cubic root of 16512325 is about 254.6455410949.

Adding to 16512325 its reverse (52321561), we get a palindrome (68833886).

The spelling of 16512325 in words is "sixteen million, five hundred twelve thousand, three hundred twenty-five".