213122422 has 4 divisors (see below), whose sum is σ = 319683636. Its totient is φ = 106561210.

The previous prime is 213122389. The next prime is 213122431. The reversal of 213122422 is 224221312.

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 213122422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53280604 + ... + 53280607.

It is an arithmetic number, because the mean of its divisors is an integer number (79920909).

Almost surely, 2^213122422 is an apocalyptic number.

213122422 is a deficient number, since it is larger than the sum of its proper divisors (106561214).

213122422 is a wasteful number, since it uses less digits than its factorization.

213122422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106561213.

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

The square root of 213122422 is about 14598.7130254691. The cubic root of 213122422 is about 597.3236556442.

Adding to 213122422 its reverse (224221312), we get a palindrome (437343734).

The spelling of 213122422 in words is "two hundred thirteen million, one hundred twenty-two thousand, four hundred twenty-two".