213223122306 has 40 divisors (see below), whose sum is σ = 482161058940. Its totient is φ = 70422309792.

The previous prime is 213223122271. The next prime is 213223122317. The reversal of 213223122306 is 603221322312.

213223122306 is a `hidden beast` number, since 2 + 1 + 322 + 31 + 2 + 2 + 306 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 177417021681 + 35806100625 = 421209^2 + 189225^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 213223122306.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6019921 + ... + 6055236.

Almost surely, 2^213223122306 is an apocalyptic number.

213223122306 is an abundant number, since it is smaller than the sum of its proper divisors (268937936634).

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

213223122306 is a wasteful number, since it uses less digits than its factorization.

213223122306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12075280 (or 12075271 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 213223122306 its reverse (603221322312), we get a palindrome (816444444618).

The spelling of 213223122306 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred twenty-two thousand, three hundred six".