442012331 has 4 divisors (see below), whose sum is σ = 446067600. Its totient is φ = 437957064.

The previous prime is 442012327. The next prime is 442012369. The reversal of 442012331 is 133210244.

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 442012331 - 2² = 442012327 is a prime.

It is a super-2 number, since 2×442012331² = 390749801512107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442012301) 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, 2027471 + ... + 2027688.

It is an arithmetic number, because the mean of its divisors is an integer number (111516900).

Almost surely, 2^442012331 is an apocalyptic number.

442012331 is a deficient number, since it is larger than the sum of its proper divisors (4055269).

442012331 is a wasteful number, since it uses less digits than its factorization.

442012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055268.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 442012331 is about 21024.0893025120. The cubic root of 442012331 is about 761.7482439767.

Adding to 442012331 its reverse (133210244), we get a palindrome (575222575).

The spelling of 442012331 in words is "four hundred forty-two million, twelve thousand, three hundred thirty-one".