444122213 has 4 divisors (see below), whose sum is σ = 458448768. Its totient is φ = 429795660.

The previous prime is 444122191. The next prime is 444122227. The reversal of 444122213 is 312221444.

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 a de Polignac number, because none of the positive numbers 2^k-444122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444122233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7163231 + ... + 7163292.

It is an arithmetic number, because the mean of its divisors is an integer number (114612192).

Almost surely, 2^444122213 is an apocalyptic number.

It is an amenable number.

444122213 is a deficient number, since it is larger than the sum of its proper divisors (14326555).

444122213 is a wasteful number, since it uses less digits than its factorization.

444122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14326554.

The product of its digits is 1536, while the sum is 23.

The square root of 444122213 is about 21074.2072923277. The cubic root of 444122213 is about 762.9583523168.

Adding to 444122213 its reverse (312221444), we get a palindrome (756343657).

The spelling of 444122213 in words is "four hundred forty-four million, one hundred twenty-two thousand, two hundred thirteen".