31223330323031 has 12 divisors (see below), whose sum is σ = 39622927534920. Its totient is φ = 24329867783760.

The previous prime is 31223330322973. The next prime is 31223330323067. The reversal of 31223330323031 is 13032303332213.

It is not a de Polignac number, because 31223330323031 - 2²⁶ = 31223263214167 is a prime.

It is a super-2 number, since 2×31223330323031² (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 = 31223330322985 and 31223330323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223330323831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28964127776 + ... + 28964128853.

It is an arithmetic number, because the mean of its divisors is an integer number (3301910627910).

Almost surely, 2^{31223330323031} is an apocalyptic number.

31223330323031 is a deficient number, since it is larger than the sum of its proper divisors (8399597211889).

31223330323031 is a wasteful number, since it uses less digits than its factorization.

31223330323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57928256654 (or 57928256647 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 29.

Adding to 31223330323031 its reverse (13032303332213), we get a palindrome (44255633655244).

The spelling of 31223330323031 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred thirty million, three hundred twenty-three thousand, thirty-one".