31442031 has 12 divisors (see below), whose sum is σ = 45834360. Its totient is φ = 20768400.

The previous prime is 31441999. The next prime is 31442069. The reversal of 31442031 is 13024413.

It is not a de Polignac number, because 31442031 - 2⁵ = 31441999 is a prime.

It is a super-2 number, since 2×31442031² = 1977202626809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31441995 and 31442013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442431) 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, 15045 + ... + 17006.

It is an arithmetic number, because the mean of its divisors is an integer number (3819530).

Almost surely, 2^31442031 is an apocalyptic number.

31442031 is a deficient number, since it is larger than the sum of its proper divisors (14392329).

31442031 is a wasteful number, since it uses less digits than its factorization.

31442031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32166 (or 32163 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31442031 is about 5607.3194130529. The cubic root of 31442031 is about 315.6241291483.

Adding to 31442031 its reverse (13024413), we get a palindrome (44466444).

The spelling of 31442031 in words is "thirty-one million, four hundred forty-two thousand, thirty-one".