215324242 has 8 divisors (see below), whose sum is σ = 369127296. Its totient is φ = 92281812.

The previous prime is 215324203. The next prime is 215324243. The reversal of 215324242 is 242423512.

215324242 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (215324243) 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, 7690138 + ... + 7690165.

It is an arithmetic number, because the mean of its divisors is an integer number (46140912).

Almost surely, 2^215324242 is an apocalyptic number.

215324242 is a deficient number, since it is larger than the sum of its proper divisors (153803054).

215324242 is a wasteful number, since it uses less digits than its factorization.

215324242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380312.

The product of its digits is 3840, while the sum is 25.

The square root of 215324242 is about 14673.9306935804. The cubic root of 215324242 is about 599.3736445070.

Adding to 215324242 its reverse (242423512), we get a palindrome (457747754).

The spelling of 215324242 in words is "two hundred fifteen million, three hundred twenty-four thousand, two hundred forty-two".