216145322 has 4 divisors (see below), whose sum is σ = 324217986. Its totient is φ = 108072660.

The previous prime is 216145309. The next prime is 216145331. The reversal of 216145322 is 223541612.

It is a happy number.

216145322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216119401 + 25921 = 14701^2 + 161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216145291 and 216145300.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54036329 + ... + 54036332.

Almost surely, 2^216145322 is an apocalyptic number.

216145322 is a deficient number, since it is larger than the sum of its proper divisors (108072664).

216145322 is a wasteful number, since it uses less digits than its factorization.

216145322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108072663.

The product of its digits is 2880, while the sum is 26.

The square root of 216145322 is about 14701.8815802604. The cubic root of 216145322 is about 600.1345272425.

Adding to 216145322 its reverse (223541612), we get a palindrome (439686934).

The spelling of 216145322 in words is "two hundred sixteen million, one hundred forty-five thousand, three hundred twenty-two".