16385525 has 12 divisors (see below), whose sum is σ = 21881412. Its totient is φ = 12099840.

The previous prime is 16385521. The next prime is 16385557. The reversal of 16385525 is 52558361.

It can be written as a sum of positive squares in 6 ways, for example, as 2798929 + 13586596 = 1673^2 + 3686^2 .

It is not a de Polignac number, because 16385525 - 2² = 16385521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16385521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24884 + ... + 25533.

It is an arithmetic number, because the mean of its divisors is an integer number (1823451).

Almost surely, 2^16385525 is an apocalyptic number.

It is an amenable number.

16385525 is a deficient number, since it is larger than the sum of its proper divisors (5495887).

16385525 is a wasteful number, since it uses less digits than its factorization.

16385525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50440 (or 50435 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 16385525 is about 4047.9037785007. The cubic root of 16385525 is about 253.9920482352.

The spelling of 16385525 in words is "sixteen million, three hundred eighty-five thousand, five hundred twenty-five".