31442841 has 12 divisors (see below), whose sum is σ = 45886932. Its totient is φ = 20745216.

The previous prime is 31442839. The next prime is 31442849. The reversal of 31442841 is 14824413.

It can be written as a sum of positive squares in 2 ways, for example, as 15210000 + 16232841 = 3900^2 + 4029^2 .

It is not a de Polignac number, because 31442841 - 2¹ = 31442839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31442849) 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 11 ways as a sum of consecutive naturals, for example, 17136 + ... + 18881.

It is an arithmetic number, because the mean of its divisors is an integer number (3823911).

Almost surely, 2^31442841 is an apocalyptic number.

It is an amenable number.

31442841 is a deficient number, since it is larger than the sum of its proper divisors (14444091).

31442841 is a wasteful number, since it uses less digits than its factorization.

31442841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36120 (or 36117 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 31442841 is about 5607.3916396128. The cubic root of 31442841 is about 315.6268394625.

The spelling of 31442841 in words is "thirty-one million, four hundred forty-two thousand, eight hundred forty-one".