63515 has 4 divisors (see below), whose sum is σ = 76224. Its totient is φ = 50808.

The previous prime is 63499. The next prime is 63521. The reversal of 63515 is 51536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63515 - 2⁴ = 63499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6347 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (19056).

2⁶³⁵¹⁵ is an apocalyptic number.

63515 is a deficient number, since it is larger than the sum of its proper divisors (12709).

63515 is a wasteful number, since it uses less digits than its factorization.

63515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12708.

The product of its digits is 450, while the sum is 20.

The square root of 63515 is about 252.0218244518. The cubic root of 63515 is about 39.8987020179.

The spelling of 63515 in words is "sixty-three thousand, five hundred fifteen".