31321043434031 has 16 divisors (see below), whose sum is σ = 34065828695808. Its totient is φ = 28624208448000.

The previous prime is 31321043434019. The next prime is 31321043434049. The reversal of 31321043434031 is 13043434012313.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321043434031 is a prime.

It is a super-2 number, since 2×31321043434031² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321043434831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29756546 + ... + 30791136.

It is an arithmetic number, because the mean of its divisors is an integer number (2129114293488).

Almost surely, 2^{31321043434031} is an apocalyptic number.

31321043434031 is a deficient number, since it is larger than the sum of its proper divisors (2744785261777).

31321043434031 is a wasteful number, since it uses less digits than its factorization.

31321043434031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057762.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31321043434031 its reverse (13043434012313), we get a palindrome (44364477446344).

The spelling of 31321043434031 in words is "thirty-one trillion, three hundred twenty-one billion, forty-three million, four hundred thirty-four thousand, thirty-one".