215403282 has 48 divisors (see below), whose sum is σ = 474259968. Its totient is φ = 70649280.

The previous prime is 215403281. The next prime is 215403313. The reversal of 215403282 is 282304512.

215403282 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (215403281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413182 + ... + 413702.

It is an arithmetic number, because the mean of its divisors is an integer number (9880416).

Almost surely, 2^215403282 is an apocalyptic number.

215403282 is an abundant number, since it is smaller than the sum of its proper divisors (258856686).

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

215403282 is a wasteful number, since it uses less digits than its factorization.

215403282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 215403282 is about 14676.6236580489. The cubic root of 215403282 is about 599.4469737599.

Adding to 215403282 its reverse (282304512), we get a palindrome (497707794).

The spelling of 215403282 in words is "two hundred fifteen million, four hundred three thousand, two hundred eighty-two".