215405234 has 16 divisors (see below), whose sum is σ = 352719360. Its totient is φ = 97845360.

The previous prime is 215405221. The next prime is 215405263. The reversal of 215405234 is 432504512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47072 + ... + 51444.

It is an arithmetic number, because the mean of its divisors is an integer number (22044960).

Almost surely, 2^215405234 is an apocalyptic number.

215405234 is a deficient number, since it is larger than the sum of its proper divisors (137314126).

215405234 is a wasteful number, since it uses less digits than its factorization.

215405234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 215405234 is about 14676.6901582067. The cubic root of 215405234 is about 599.4487844983.

Adding to 215405234 its reverse (432504512), we get a palindrome (647909746).

The spelling of 215405234 in words is "two hundred fifteen million, four hundred five thousand, two hundred thirty-four".