31321130331031 has 8 divisors (see below), whose sum is σ = 31912574626800. Its totient is φ = 30729703797312.

The previous prime is 31321130331019. The next prime is 31321130331053. The reversal of 31321130331031 is 13013303112313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321130331031 is a prime.

It is a super-2 number, since 2×31321130331031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31321130330987 and 31321130331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321130331061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853365 + ... + 7960558.

It is an arithmetic number, because the mean of its divisors is an integer number (3989071828350).

Almost surely, 2^{31321130331031} is an apocalyptic number.

31321130331031 is a deficient number, since it is larger than the sum of its proper divisors (591444295769).

31321130331031 is an equidigital number, since it uses as much as digits as its factorization.

31321130331031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881025.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31321130331031 its reverse (13013303112313), we get a palindrome (44334433443344).

The spelling of 31321130331031 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred thirty million, three hundred thirty-one thousand, thirty-one".