63506525 has 6 divisors (see below), whose sum is σ = 78748122. Its totient is φ = 50805200.

The previous prime is 63506503. The next prime is 63506563. The reversal of 63506525 is 52560536.

It can be written as a sum of positive squares in 3 ways, for example, as 811801 + 62694724 = 901^2 + 7918^2 .

It is not a de Polignac number, because 63506525 - 2¹⁸ = 63244381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63506491 and 63506500.

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, 1270106 + ... + 1270155.

It is an arithmetic number, because the mean of its divisors is an integer number (13124687).

Almost surely, 2^63506525 is an apocalyptic number.

It is an amenable number.

63506525 is a deficient number, since it is larger than the sum of its proper divisors (15241597).

63506525 is a wasteful number, since it uses less digits than its factorization.

63506525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540271 (or 2540266 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 63506525 is about 7969.0981296506. The cubic root of 63506525 is about 398.9692733712.

The spelling of 63506525 in words is "sixty-three million, five hundred six thousand, five hundred twenty-five".