215772234 has 32 divisors (see below), whose sum is σ = 444643776. Its totient is φ = 69753600.

The previous prime is 215772203. The next prime is 215772239. The reversal of 215772234 is 432277512.

215772234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 215772195 and 215772204.

It is not an unprimeable number, because it can be changed into a prime (215772239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75634 + ... + 78434.

It is an arithmetic number, because the mean of its divisors is an integer number (13895118).

Almost surely, 2^215772234 is an apocalyptic number.

215772234 is an abundant number, since it is smaller than the sum of its proper divisors (228871542).

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

215772234 is a wasteful number, since it uses less digits than its factorization.

215772234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190.

The product of its digits is 23520, while the sum is 33.

The square root of 215772234 is about 14689.1876562320. The cubic root of 215772234 is about 599.7890313847.

The spelling of 215772234 in words is "two hundred fifteen million, seven hundred seventy-two thousand, two hundred thirty-four".