65513125 has 20 divisors (see below), whose sum is σ = 84107452. Its totient is φ = 50976000.

The previous prime is 65513113. The next prime is 65513213. The reversal of 65513125 is 52131556.

It can be written as a sum of positive squares in 10 ways, for example, as 39929761 + 25583364 = 6319^2 + 5058^2 .

It is not a de Polignac number, because 65513125 - 2⁵ = 65513093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65513093 and 65513102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21709 + ... + 24541.

Almost surely, 2^65513125 is an apocalyptic number.

It is an amenable number.

65513125 is a deficient number, since it is larger than the sum of its proper divisors (18594327).

65513125 is an equidigital number, since it uses as much as digits as its factorization.

65513125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890 (or 2875 counting only the distinct ones).

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

The square root of 65513125 is about 8094.0178527107. The cubic root of 65513125 is about 403.1278218259.

The spelling of 65513125 in words is "sixty-five million, five hundred thirteen thousand, one hundred twenty-five".