213122441 has 4 divisors (see below), whose sum is σ = 243568512. Its totient is φ = 182676372.

The previous prime is 213122431. The next prime is 213122443. The reversal of 213122441 is 144221312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213122441 - 2²⁶ = 146013577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213122443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15223025 + ... + 15223038.

It is an arithmetic number, because the mean of its divisors is an integer number (60892128).

Almost surely, 2^213122441 is an apocalyptic number.

It is an amenable number.

213122441 is a deficient number, since it is larger than the sum of its proper divisors (30446071).

213122441 is an equidigital number, since it uses as much as digits as its factorization.

213122441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30446070.

The product of its digits is 384, while the sum is 20.

The square root of 213122441 is about 14598.7136762113. The cubic root of 213122441 is about 597.3236733948.

Adding to 213122441 its reverse (144221312), we get a palindrome (357343753).

The spelling of 213122441 in words is "two hundred thirteen million, one hundred twenty-two thousand, four hundred forty-one".