63872515 has 16 divisors (see below), whose sum is σ = 89084160. Its totient is φ = 43054560.

The previous prime is 63872513. The next prime is 63872521. The reversal of 63872515 is 51527836.

It is not a de Polignac number, because 63872515 - 2¹ = 63872513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63872513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13401 + ... + 17530.

It is an arithmetic number, because the mean of its divisors is an integer number (5567760).

Almost surely, 2^63872515 is an apocalyptic number.

63872515 is a deficient number, since it is larger than the sum of its proper divisors (25211645).

63872515 is a wasteful number, since it uses less digits than its factorization.

63872515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31002.

The product of its digits is 50400, while the sum is 37.

The square root of 63872515 is about 7992.0282156659. The cubic root of 63872515 is about 399.7342297045.

It can be divided in two parts, 638 and 72515, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 63872515 in words is "sixty-three million, eight hundred seventy-two thousand, five hundred fifteen".