40442031 has 64 divisors (see below), whose sum is σ = 74511360. Its totient is φ = 21150720.

The previous prime is 40442009. The next prime is 40442057. The reversal of 40442031 is 13024404.

40442031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40442031 - 2⁶ = 40441967 is a prime.

It is a super-2 number, since 2×40442031² = 3271115742809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40441995 and 40442013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131580 + ... + 131886.

It is an arithmetic number, because the mean of its divisors is an integer number (1164240).

Almost surely, 2^40442031 is an apocalyptic number.

40442031 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40442031 is a deficient number, since it is larger than the sum of its proper divisors (34069329).

40442031 is a wasteful number, since it uses less digits than its factorization.

40442031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40442031 is about 6359.4049249910. The cubic root of 40442031 is about 343.2503477654.

Adding to 40442031 its reverse (13024404), we get a palindrome (53466435).

The spelling of 40442031 in words is "forty million, four hundred forty-two thousand, thirty-one".