64687215 has 8 divisors (see below), whose sum is σ = 103499568. Its totient is φ = 34499840.

The previous prime is 64687213. The next prime is 64687219. The reversal of 64687215 is 51278646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64687215 - 2¹ = 64687213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64687213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156226 + ... + 2156255.

It is an arithmetic number, because the mean of its divisors is an integer number (12937446).

Almost surely, 2^64687215 is an apocalyptic number.

64687215 is a deficient number, since it is larger than the sum of its proper divisors (38812353).

64687215 is a wasteful number, since it uses less digits than its factorization.

64687215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312489.

The product of its digits is 80640, while the sum is 39.

The square root of 64687215 is about 8042.8362534618. The cubic root of 64687215 is about 401.4266038714.

The spelling of 64687215 in words is "sixty-four million, six hundred eighty-seven thousand, two hundred fifteen".