213132222 has 40 divisors (see below), whose sum is σ = 479055456. Its totient is φ = 70823808.

The previous prime is 213132221. The next prime is 213132233. The reversal of 213132222 is 222231312.

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 = 213132195 and 213132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213132221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55323 + ... + 59049.

Almost surely, 2^213132222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213132222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239527728).

213132222 is an abundant number, since it is smaller than the sum of its proper divisors (265923234).

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

213132222 is a wasteful number, since it uses less digits than its factorization.

213132222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094 (or 4085 counting only the distinct ones).

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

The square root of 213132222 is about 14599.0486676358. The cubic root of 213132222 is about 597.3328110740.

Adding to 213132222 its reverse (222231312), we get a palindrome (435363534).

The spelling of 213132222 in words is "two hundred thirteen million, one hundred thirty-two thousand, two hundred twenty-two".