16525513 has 8 divisors (see below), whose sum is σ = 17546760. Its totient is φ = 15509760.

The previous prime is 16525507. The next prime is 16525541. The reversal of 16525513 is 31552561.

16525513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2108304 + 14417209 = 1452^2 + 3797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16525513 - 2⁹ = 16525001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16525013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6003 + ... + 8311.

It is an arithmetic number, because the mean of its divisors is an integer number (2193345).

Almost surely, 2^16525513 is an apocalyptic number.

It is an amenable number.

16525513 is a deficient number, since it is larger than the sum of its proper divisors (1021247).

16525513 is a wasteful number, since it uses less digits than its factorization.

16525513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747.

The product of its digits is 4500, while the sum is 28.

The square root of 16525513 is about 4065.1584224972. The cubic root of 16525513 is about 254.7133161606.

The spelling of 16525513 in words is "sixteen million, five hundred twenty-five thousand, five hundred thirteen".