64632215 has 16 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 48407040.

The previous prime is 64632209. The next prime is 64632221. The reversal of 64632215 is 51223646.

It is an interprime number because it is at equal distance from previous prime (64632209) and next prime (64632221).

It is not a de Polignac number, because 64632215 - 2⁶ = 64632151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15005 + ... + 18825.

It is an arithmetic number, because the mean of its divisors is an integer number (5159700).

Almost surely, 2^64632215 is an apocalyptic number.

64632215 is a deficient number, since it is larger than the sum of its proper divisors (17922985).

64632215 is a wasteful number, since it uses less digits than its factorization.

64632215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042.

The product of its digits is 8640, while the sum is 29.

The square root of 64632215 is about 8039.4163345357. The cubic root of 64632215 is about 401.3128012519.

The spelling of 64632215 in words is "sixty-four million, six hundred thirty-two thousand, two hundred fifteen".