215420312 has 16 divisors (see below), whose sum is σ = 404295840. Its totient is φ = 107608096.

The previous prime is 215420291. The next prime is 215420329. The reversal of 215420312 is 213024512.

215420312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3383 + ... + 21030.

It is an arithmetic number, because the mean of its divisors is an integer number (25268490).

Almost surely, 2^215420312 is an apocalyptic number.

It is an amenable number.

215420312 is a deficient number, since it is larger than the sum of its proper divisors (188875528).

215420312 is a wasteful number, since it uses less digits than its factorization.

215420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25522 (or 25518 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 215420312 is about 14677.2038208918. The cubic root of 215420312 is about 599.4627709704.

Adding to 215420312 its reverse (213024512), we get a palindrome (428444824).

The spelling of 215420312 in words is "two hundred fifteen million, four hundred twenty thousand, three hundred twelve".