442211971 has 4 divisors (see below), whose sum is σ = 442353744. Its totient is φ = 442070200.

The previous prime is 442211969. The next prime is 442211983. The reversal of 442211971 is 179112244.

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

It is a cyclic number.

It is not a de Polignac number, because 442211971 - 2¹ = 442211969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442211911) 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, 66100 + ... + 72481.

It is an arithmetic number, because the mean of its divisors is an integer number (110588436).

Almost surely, 2^442211971 is an apocalyptic number.

442211971 is a deficient number, since it is larger than the sum of its proper divisors (141773).

442211971 is a wasteful number, since it uses less digits than its factorization.

442211971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141772.

The product of its digits is 4032, while the sum is 31.

The square root of 442211971 is about 21028.8366535099. The cubic root of 442211971 is about 761.8629108603.

The spelling of 442211971 in words is "four hundred forty-two million, two hundred eleven thousand, nine hundred seventy-one".