215470242 has 48 divisors (see below), whose sum is σ = 511318080. Its totient is φ = 65170656.

The previous prime is 215470193. The next prime is 215470259. The reversal of 215470242 is 242074512.

215470242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6003 + ... + 21609.

It is an arithmetic number, because the mean of its divisors is an integer number (10652460).

Almost surely, 2^215470242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215470242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255659040).

215470242 is an abundant number, since it is smaller than the sum of its proper divisors (295847838).

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

215470242 is a wasteful number, since it uses less digits than its factorization.

215470242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15687 (or 15684 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 215470242 is about 14678.9046594083. The cubic root of 215470242 is about 599.5090817750.

The spelling of 215470242 in words is "two hundred fifteen million, four hundred seventy thousand, two hundred forty-two".