64215146 has 4 divisors (see below), whose sum is σ = 96322722. Its totient is φ = 32107572.

The previous prime is 64215139. The next prime is 64215157. The reversal of 64215146 is 64151246.

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

It can be written as a sum of positive squares in only one way, i.e., 41280625 + 22934521 = 6425^2 + 4789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16053785 + ... + 16053788.

Almost surely, 2^64215146 is an apocalyptic number.

64215146 is a deficient number, since it is larger than the sum of its proper divisors (32107576).

64215146 is a wasteful number, since it uses less digits than its factorization.

64215146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32107575.

The product of its digits is 5760, while the sum is 29.

The square root of 64215146 is about 8013.4353432220. The cubic root of 64215146 is about 400.4477195145.

The spelling of 64215146 in words is "sixty-four million, two hundred fifteen thousand, one hundred forty-six".