213212422 has 4 divisors (see below), whose sum is σ = 319818636. Its totient is φ = 106606210.

The previous prime is 213212411. The next prime is 213212429. The reversal of 213212422 is 224212312.

213212422 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 is a self number, because there is not a number n which added to its sum of digits gives 213212422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53303104 + ... + 53303107.

It is an arithmetic number, because the mean of its divisors is an integer number (79954659).

Almost surely, 2^213212422 is an apocalyptic number.

213212422 is a deficient number, since it is larger than the sum of its proper divisors (106606214).

213212422 is a wasteful number, since it uses less digits than its factorization.

213212422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106606213.

The product of its digits is 384, while the sum is 19.

The square root of 213212422 is about 14601.7951636092. The cubic root of 213212422 is about 597.4077255776.

Adding to 213212422 its reverse (224212312), we get a palindrome (437424734).

The spelling of 213212422 in words is "two hundred thirteen million, two hundred twelve thousand, four hundred twenty-two".