442122311 has 4 divisors (see below), whose sum is σ = 452905824. Its totient is φ = 431338800.

The previous prime is 442122301. The next prime is 442122319. The reversal of 442122311 is 113221244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442122311 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 (442122319) 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, 5391695 + ... + 5391776.

It is an arithmetic number, because the mean of its divisors is an integer number (113226456).

Almost surely, 2^442122311 is an apocalyptic number.

442122311 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

442122311 is a deficient number, since it is larger than the sum of its proper divisors (10783513).

442122311 is a wasteful number, since it uses less digits than its factorization.

442122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10783512.

The product of its digits is 384, while the sum is 20.

The square root of 442122311 is about 21026.7047109146. The cubic root of 442122311 is about 761.8114172704.

Adding to 442122311 its reverse (113221244), we get a palindrome (555343555).

The spelling of 442122311 in words is "four hundred forty-two million, one hundred twenty-two thousand, three hundred eleven".