31144444012 has 24 divisors (see below), whose sum is σ = 59469277392. Its totient is φ = 14153779200.

The previous prime is 31144443991. The next prime is 31144444013. The reversal of 31144444012 is 21044444113.

It is a super-2 number, since 2×31144444012² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31144444013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165348 + ... + 299380.

It is an arithmetic number, because the mean of its divisors is an integer number (2477886558).

Almost surely, 2^31144444012 is an apocalyptic number.

It is an amenable number.

31144444012 is a deficient number, since it is larger than the sum of its proper divisors (28324833380).

31144444012 is a wasteful number, since it uses less digits than its factorization.

31144444012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139329 (or 139327 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 31144444012 its reverse (21044444113), we get a palindrome (52188888125).

The spelling of 31144444012 in words is "thirty-one billion, one hundred forty-four million, four hundred forty-four thousand, twelve".