65515525 has 12 divisors (see below), whose sum is σ = 82572964. Its totient is φ = 51552000.

The previous prime is 65515487. The next prime is 65515537. The reversal of 65515525 is 52551556.

65515525 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 6 ways, for example, as 25180324 + 40335201 = 5018^2 + 6351^2 .

It is not a de Polignac number, because 65515525 - 2¹³ = 65507333 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19956 + ... + 23005.

Almost surely, 2^65515525 is an apocalyptic number.

It is an amenable number.

65515525 is a deficient number, since it is larger than the sum of its proper divisors (17057439).

65515525 is a wasteful number, since it uses less digits than its factorization.

65515525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43032 (or 43027 counting only the distinct ones).

The product of its digits is 37500, while the sum is 34.

The square root of 65515525 is about 8094.1661089948. The cubic root of 65515525 is about 403.1327444779.

The spelling of 65515525 in words is "sixty-five million, five hundred fifteen thousand, five hundred twenty-five".