64215047 has 8 divisors (see below), whose sum is σ = 69278160. Its totient is φ = 59169600.

The previous prime is 64215029. The next prime is 64215097. The reversal of 64215047 is 74051246.

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

It is a cyclic number.

It is not a de Polignac number, because 64215047 - 2¹⁰ = 64214023 is a prime.

It is a super-2 number, since 2×64215047² = 8247144522424418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64215097) 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, 3704 + ... + 11922.

It is an arithmetic number, because the mean of its divisors is an integer number (8659770).

Almost surely, 2^64215047 is an apocalyptic number.

64215047 is a deficient number, since it is larger than the sum of its proper divisors (5063113).

64215047 is a wasteful number, since it uses less digits than its factorization.

64215047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8833.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 64215047 is about 8013.4291660936. The cubic root of 64215047 is about 400.4475137253.

The spelling of 64215047 in words is "sixty-four million, two hundred fifteen thousand, forty-seven".