215023242 has 32 divisors (see below), whose sum is σ = 520394112. Its totient is φ = 57821184.

The previous prime is 215023217. The next prime is 215023271. The reversal of 215023242 is 242320512.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 149863 + ... + 151290.

It is an arithmetic number, because the mean of its divisors is an integer number (16262316).

Almost surely, 2^215023242 is an apocalyptic number.

215023242 is an abundant number, since it is smaller than the sum of its proper divisors (305370870).

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

215023242 is a wasteful number, since it uses less digits than its factorization.

215023242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301182.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 215023242 is about 14663.6708228192. The cubic root of 215023242 is about 599.0942277603.

Adding to 215023242 its reverse (242320512), we get a palindrome (457343754).

The spelling of 215023242 in words is "two hundred fifteen million, twenty-three thousand, two hundred forty-two".