442140213 has 8 divisors (see below), whose sum is σ = 594162688. Its totient is φ = 292438944.

The previous prime is 442140173. The next prime is 442140311. The reversal of 442140213 is 312041244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442140213 - 2¹⁸ = 441878069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442140213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442140313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579856 + ... + 580617.

It is an arithmetic number, because the mean of its divisors is an integer number (74270336).

Almost surely, 2^442140213 is an apocalyptic number.

It is an amenable number.

442140213 is a deficient number, since it is larger than the sum of its proper divisors (152022475).

442140213 is a wasteful number, since it uses less digits than its factorization.

442140213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160603.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 442140213 is about 21027.1304033622. The cubic root of 442140213 is about 761.8216993150.

Adding to 442140213 its reverse (312041244), we get a palindrome (754181457).

The spelling of 442140213 in words is "four hundred forty-two million, one hundred forty thousand, two hundred thirteen".