31321434004 has 12 divisors (see below), whose sum is σ = 62642868064. Its totient is φ = 13423471704.

The previous prime is 31321433993. The next prime is 31321434019. The reversal of 31321434004 is 40043412313.

31321434004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31321434004.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 559311294 + ... + 559311349.

Almost surely, 2^31321434004 is an apocalyptic number.

It is an amenable number.

31321434004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31321434004 is a wasteful number, since it uses less digits than its factorization.

31321434004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118622654 (or 1118622652 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31321434004 its reverse (40043412313), we get a palindrome (71364846317).

The spelling of 31321434004 in words is "thirty-one billion, three hundred twenty-one million, four hundred thirty-four thousand, four".