442041631 has 4 divisors (see below), whose sum is σ = 465307000. Its totient is φ = 418776264.

The previous prime is 442041619. The next prime is 442041643. The reversal of 442041631 is 136140244.

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

It is an interprime number because it is at equal distance from previous prime (442041619) and next prime (442041643).

It is not a de Polignac number, because 442041631 - 2¹⁹ = 441517343 is a prime.

It is a super-2 number, since 2×442041631² = 390801607074280322, 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 = 442041596 and 442041605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442041671) 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, 11632656 + ... + 11632693.

It is an arithmetic number, because the mean of its divisors is an integer number (116326750).

Almost surely, 2^442041631 is an apocalyptic number.

442041631 is a deficient number, since it is larger than the sum of its proper divisors (23265369).

442041631 is a wasteful number, since it uses less digits than its factorization.

442041631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23265368.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 442041631 is about 21024.7861106837. The cubic root of 442041631 is about 761.7650751288.

Adding to 442041631 its reverse (136140244), we get a palindrome (578181875).

The spelling of 442041631 in words is "four hundred forty-two million, forty-one thousand, six hundred thirty-one".