442111631 has 16 divisors (see below), whose sum is σ = 490878528. Its totient is φ = 395539200.

The previous prime is 442111609. The next prime is 442111633. The reversal of 442111631 is 136111244.

It is a cyclic number.

It is not a de Polignac number, because 442111631 - 2⁶ = 442111567 is a prime.

It is a super-2 number, since 2×442111631² = 390925388530960322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442111597 and 442111606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442111633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133526 + ... + 136796.

It is an arithmetic number, because the mean of its divisors is an integer number (30679908).

Almost surely, 2^442111631 is an apocalyptic number.

442111631 is a deficient number, since it is larger than the sum of its proper divisors (48766897).

442111631 is a wasteful number, since it uses less digits than its factorization.

442111631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602.

The product of its digits is 576, while the sum is 23.

The square root of 442111631 is about 21026.4507466191. The cubic root of 442111631 is about 761.8052830618.

Adding to 442111631 its reverse (136111244), we get a palindrome (578222875).

The spelling of 442111631 in words is "four hundred forty-two million, one hundred eleven thousand, six hundred thirty-one".