64215069 has 16 divisors (see below), whose sum is σ = 92197440. Its totient is φ = 39607040.

The previous prime is 64215029. The next prime is 64215097. The reversal of 64215069 is 96051246.

64215069 = 297² + 298² + ... + 602².

It is a cyclic number.

It is not a de Polignac number, because 64215069 - 2¹² = 64210973 is a prime.

It is a super-2 number, since 2×64215069² = 8247150173349522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64215029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7662 + ... + 13679.

It is an arithmetic number, because the mean of its divisors is an integer number (5762340).

Almost surely, 2^64215069 is an apocalyptic number.

It is an amenable number.

64215069 is a deficient number, since it is larger than the sum of its proper divisors (27982371).

64215069 is a wasteful number, since it uses less digits than its factorization.

64215069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21420.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 64215069 is about 8013.4305387892. The cubic root of 64215069 is about 400.4475594562.

The spelling of 64215069 in words is "sixty-four million, two hundred fifteen thousand, sixty-nine".