442241213 has 16 divisors (see below), whose sum is σ = 485559360. Its totient is φ = 400915200.

The previous prime is 442241161. The next prime is 442241243. The reversal of 442241213 is 312142244.

It is a cyclic number.

It is not a de Polignac number, because 442241213 - 2¹⁰ = 442240189 is a prime.

It is a super-2 number, since 2×442241213² = 391154580951422738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442241243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280718 + ... + 282288.

It is an arithmetic number, because the mean of its divisors is an integer number (30347460).

Almost surely, 2^442241213 is an apocalyptic number.

It is an amenable number.

442241213 is a deficient number, since it is larger than the sum of its proper divisors (43318147).

442241213 is a wasteful number, since it uses less digits than its factorization.

442241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

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

The square root of 442241213 is about 21029.5319253663. The cubic root of 442241213 is about 761.8797036397.

Adding to 442241213 its reverse (312142244), we get a palindrome (754383457).

The spelling of 442241213 in words is "four hundred forty-two million, two hundred forty-one thousand, two hundred thirteen".