215076864 has 104 divisors (see below), whose sum is σ = 599188032. Its totient is φ = 68485120.

The previous prime is 215076863. The next prime is 215076919. The reversal of 215076864 is 468670512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215076863) 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, 282244 + ... + 283004.

Almost surely, 2^215076864 is an apocalyptic number.

215076864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215076864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299594016).

215076864 is an abundant number, since it is smaller than the sum of its proper divisors (384111168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215076864 is an equidigital number, since it uses as much as digits as its factorization.

215076864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 789 counting only the distinct ones).

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

The square root of 215076864 is about 14665.4991050424. The cubic root of 215076864 is about 599.1440238666.

The spelling of 215076864 in words is "two hundred fifteen million, seventy-six thousand, eight hundred sixty-four".