215213412 has 12 divisors (see below), whose sum is σ = 502164656. Its totient is φ = 71737800.

The previous prime is 215213407. The next prime is 215213419. The reversal of 215213412 is 214312512.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (215213419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8967214 + ... + 8967237.

Almost surely, 2^215213412 is an apocalyptic number.

It is an amenable number.

215213412 is an abundant number, since it is smaller than the sum of its proper divisors (286951244).

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

215213412 is a wasteful number, since it uses less digits than its factorization.

215213412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17934458 (or 17934456 counting only the distinct ones).

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

The square root of 215213412 is about 14670.1537824250. The cubic root of 215213412 is about 599.2707918960.

Adding to 215213412 its reverse (214312512), we get a palindrome (429525924).

The spelling of 215213412 in words is "two hundred fifteen million, two hundred thirteen thousand, four hundred twelve".