31000430444 has 24 divisors (see below), whose sum is σ = 57447438048. Its totient is φ = 14587050240.

The previous prime is 31000430437. The next prime is 31000430467. The reversal of 31000430444 is 44403400013.

It is a super-2 number, since 2×31000430444² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205222 + ... + 1230674.

It is an arithmetic number, because the mean of its divisors is an integer number (2393643252).

Almost surely, 2^31000430444 is an apocalyptic number.

31000430444 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31000430444 is a deficient number, since it is larger than the sum of its proper divisors (26447007604).

31000430444 is a wasteful number, since it uses less digits than its factorization.

31000430444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43385 (or 43383 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31000430444 its reverse (44403400013), we get a palindrome (75403830457).

The spelling of 31000430444 in words is "thirty-one billion, four hundred thirty thousand, four hundred forty-four".