31123223310331 has 8 divisors (see below), whose sum is σ = 31232860046144. Its totient is φ = 31013767944000.

The previous prime is 31123223310293. The next prime is 31123223310397. The reversal of 31123223310331 is 13301332232113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31123223310331 - 2⁷ = 31123223310203 is a prime.

It is a super-2 number, since 2×31123223310331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31123223310331.

It is not an unprimeable number, because it can be changed into a prime (31123223310631) 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, 44998560 + ... + 45684973.

It is an arithmetic number, because the mean of its divisors is an integer number (3904107505768).

Almost surely, 2^{31123223310331} is an apocalyptic number.

31123223310331 is a deficient number, since it is larger than the sum of its proper divisors (109636735813).

31123223310331 is an equidigital number, since it uses as much as digits as its factorization.

31123223310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90684741.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31123223310331 its reverse (13301332232113), we get a palindrome (44424555542444).

The spelling of 31123223310331 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-three million, three hundred ten thousand, three hundred thirty-one".