213223122 has 24 divisors (see below), whose sum is σ = 527981376. Its totient is φ = 60920856.

The previous prime is 213223117. The next prime is 213223123. The reversal of 213223122 is 221322312.

213223122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213223095 and 213223104.

It is not an unprimeable number, because it can be changed into a prime (213223123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 845998 + ... + 846249.

It is an arithmetic number, because the mean of its divisors is an integer number (21999224).

Almost surely, 2^213223122 is an apocalyptic number.

213223122 is an abundant number, since it is smaller than the sum of its proper divisors (314758254).

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

213223122 is a wasteful number, since it uses less digits than its factorization.

213223122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692262 (or 1692259 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 213223122 is about 14602.1615523182. The cubic root of 213223122 is about 597.4177189849.

Adding to 213223122 its reverse (221322312), we get a palindrome (434545434).

It can be divided in two parts, 21322312 and 2, that multiplied together give a palindrome (42644624).

The spelling of 213223122 in words is "two hundred thirteen million, two hundred twenty-three thousand, one hundred twenty-two".