442102213 has 4 divisors (see below), whose sum is σ = 505259680. Its totient is φ = 378944748.

The previous prime is 442102123. The next prime is 442102231. The reversal of 442102213 is 312201244.

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 de Polignac number, because none of the positive numbers 2^k-442102213 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 (442102813) 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, 31578723 + ... + 31578736.

It is an arithmetic number, because the mean of its divisors is an integer number (126314920).

Almost surely, 2^442102213 is an apocalyptic number.

It is an amenable number.

442102213 is a deficient number, since it is larger than the sum of its proper divisors (63157467).

442102213 is an equidigital number, since it uses as much as digits as its factorization.

442102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63157466.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 442102213 is about 21026.2267894171. The cubic root of 442102213 is about 761.7998736187.

Adding to 442102213 its reverse (312201244), we get a palindrome (754303457).

The spelling of 442102213 in words is "four hundred forty-two million, one hundred two thousand, two hundred thirteen".