215340442 has 8 divisors (see below), whose sum is σ = 328485600. Its totient is φ = 105845244.

The previous prime is 215340413. The next prime is 215340451. The reversal of 215340442 is 244043512.

It is a happy number.

215340442 is digitally balanced in base 3, because in such base 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912342 + ... + 912577.

It is an arithmetic number, because the mean of its divisors is an integer number (41060700).

Almost surely, 2^215340442 is an apocalyptic number.

215340442 is a deficient number, since it is larger than the sum of its proper divisors (113145158).

215340442 is a wasteful number, since it uses less digits than its factorization.

215340442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824980.

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

The square root of 215340442 is about 14674.4826825343. The cubic root of 215340442 is about 599.3886754969.

Adding to 215340442 its reverse (244043512), we get a palindrome (459383954).

The spelling of 215340442 in words is "two hundred fifteen million, three hundred forty thousand, four hundred forty-two".