442411213 has 4 divisors (see below), whose sum is σ = 468435420. Its totient is φ = 416387008.

The previous prime is 442411163. The next prime is 442411237. The reversal of 442411213 is 312114244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256416169 + 185995044 = 16013^2 + 13638^2 .

It is a cyclic number.

It is not a de Polignac number, because 442411213 - 2¹³ = 442403021 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 (442411243) 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, 13012078 + ... + 13012111.

It is an arithmetic number, because the mean of its divisors is an integer number (117108855).

Almost surely, 2^442411213 is an apocalyptic number.

It is an amenable number.

442411213 is a deficient number, since it is larger than the sum of its proper divisors (26024207).

442411213 is a wasteful number, since it uses less digits than its factorization.

442411213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26024206.

The product of its digits is 768, while the sum is 22.

The square root of 442411213 is about 21033.5734719519. The cubic root of 442411213 is about 761.9773147422.

Adding to 442411213 its reverse (312114244), we get a palindrome (754525457).

It can be divided in two parts, 44241 and 1213, that added together give a palindrome (45454).

The spelling of 442411213 in words is "four hundred forty-two million, four hundred eleven thousand, two hundred thirteen".