31023120323 has 32 divisors (see below), whose sum is σ = 34608201600. Its totient is φ = 27631549440.

The previous prime is 31023120277. The next prime is 31023120353. The reversal of 31023120323 is 32302132013.

It is a cyclic number.

It is not a de Polignac number, because 31023120323 - 2¹² = 31023116227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023120295 and 31023120304.

It is not an unprimeable number, because it can be changed into a prime (31023120353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11518565 + ... + 11521257.

It is an arithmetic number, because the mean of its divisors is an integer number (1081506300).

Almost surely, 2^31023120323 is an apocalyptic number.

31023120323 is a deficient number, since it is larger than the sum of its proper divisors (3585081277).

31023120323 is a wasteful number, since it uses less digits than its factorization.

31023120323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31023120323 its reverse (32302132013), we get a palindrome (63325252336).

The spelling of 31023120323 in words is "thirty-one billion, twenty-three million, one hundred twenty thousand, three hundred twenty-three".