64515 has 32 divisors (see below), whose sum is σ = 124416. Its totient is φ = 28160.

The previous prime is 64513. The next prime is 64553. The reversal of 64515 is 51546.

It is a happy number.

64515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 254²-1.

It is not a de Polignac number, because 64515 - 2¹ = 64513 is a prime.

It is a plaindrome in base 13.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 64491 and 64500.

It is not an unprimeable number, because it can be changed into a prime (64513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2794 + ... + 2816.

It is an arithmetic number, because the mean of its divisors is an integer number (3888).

2⁶⁴⁵¹⁵ is an apocalyptic number.

64515 is a deficient number, since it is larger than the sum of its proper divisors (59901).

64515 is a wasteful number, since it uses less digits than its factorization.

64515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59.

The product of its digits is 600, while the sum is 21.

The square root of 64515 is about 253.9980314884. The cubic root of 64515 is about 40.1070051588.

The spelling of 64515 in words is "sixty-four thousand, five hundred fifteen".