31444431404 has 24 divisors (see below), whose sum is σ = 55585259856. Its totient is φ = 15563000000.

The previous prime is 31444431377. The next prime is 31444431419. The reversal of 31444431404 is 40413444413.

It is a super-2 number, since 2×31444431404² (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, 3187079 + ... + 3196929.

It is an arithmetic number, because the mean of its divisors is an integer number (2316052494).

Almost surely, 2^31444431404 is an apocalyptic number.

It is an amenable number.

31444431404 is a deficient number, since it is larger than the sum of its proper divisors (24140828452).

31444431404 is a wasteful number, since it uses less digits than its factorization.

31444431404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17857 (or 17855 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 31444431404 its reverse (40413444413), we get a palindrome (71857875817).

The spelling of 31444431404 in words is "thirty-one billion, four hundred forty-four million, four hundred thirty-one thousand, four hundred four".