215215000 has 320 divisors, whose sum is σ = 692778240. Its totient is φ = 60480000.

The previous prime is 215214983. The next prime is 215215001. The reversal of 215215000 is 512512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215215001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5004979 + ... + 5005021.

It is an arithmetic number, because the mean of its divisors is an integer number (2164932).

Almost surely, 2^215215000 is an apocalyptic number.

215215000 is a gapful number since it is divisible by the number (20) 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 215215000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346389120).

215215000 is an abundant number, since it is smaller than the sum of its proper divisors (477563240).

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

215215000 is a wasteful number, since it uses less digits than its factorization.

215215000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 215215000 is about 14670.2079058206. The cubic root of 215215000 is about 599.2722658433.

Adding to 215215000 its reverse (512512), we get a palindrome (215727512).

The spelling of 215215000 in words is "two hundred fifteen million, two hundred fifteen thousand".