40042331 has 16 divisors (see below), whose sum is σ = 47190528. Its totient is φ = 33264000.

The previous prime is 40042313. The next prime is 40042339. The reversal of 40042331 is 13324004.

It is a de Polignac number, because none of the positive numbers 2^k-40042331 is a prime.

It is a super-2 number, since 2×40042331² = 3206776543827122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40042339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45011 + ... + 45891.

It is an arithmetic number, because the mean of its divisors is an integer number (2949408).

Almost surely, 2^40042331 is an apocalyptic number.

40042331 is a deficient number, since it is larger than the sum of its proper divisors (7148197).

40042331 is a wasteful number, since it uses less digits than its factorization.

40042331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40042331 is about 6327.9009948007. The cubic root of 40042331 is about 342.1157884560.

Adding to 40042331 its reverse (13324004), we get a palindrome (53366335).

The spelling of 40042331 in words is "forty million, forty-two thousand, three hundred thirty-one".