31442444031 has 4 divisors (see below), whose sum is σ = 41923258712. Its totient is φ = 20961629352.

The previous prime is 31442444023. The next prime is 31442444057. The reversal of 31442444031 is 13044424413.

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

It is not a de Polignac number, because 31442444031 - 2³ = 31442444023 is a prime.

It is a super-3 number, since 3×31442444031³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31442444031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442443031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240407336 + ... + 5240407341.

It is an arithmetic number, because the mean of its divisors is an integer number (10480814678).

Almost surely, 2^31442444031 is an apocalyptic number.

31442444031 is a deficient number, since it is larger than the sum of its proper divisors (10480814681).

31442444031 is a wasteful number, since it uses less digits than its factorization.

31442444031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480814680.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 31442444031 its reverse (13044424413), we get a palindrome (44486868444).

The spelling of 31442444031 in words is "thirty-one billion, four hundred forty-two million, four hundred forty-four thousand, thirty-one".