215214312 has 64 divisors (see below), whose sum is σ = 574548480. Its totient is φ = 67015872.

The previous prime is 215214299. The next prime is 215214331. The reversal of 215214312 is 213412512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19203 + ... + 28269.

It is an arithmetic number, because the mean of its divisors is an integer number (8977320).

Almost surely, 2^215214312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215214312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287274240).

215214312 is an abundant number, since it is smaller than the sum of its proper divisors (359334168).

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

215214312 is a wasteful number, since it uses less digits than its factorization.

215214312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142 (or 9138 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 215214312 is about 14670.1844569181. The cubic root of 215214312 is about 599.2716272575.

Adding to 215214312 its reverse (213412512), we get a palindrome (428626824).

The spelling of 215214312 in words is "two hundred fifteen million, two hundred fourteen thousand, three hundred twelve".