31223320231323 has 16 divisors (see below), whose sum is σ = 45415874547072. Its totient is φ = 18923167704000.

The previous prime is 31223320231321. The next prime is 31223320231339. The reversal of 31223320231323 is 32313202332213.

It is not a de Polignac number, because 31223320231323 - 2¹ = 31223320231321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31223320231321) 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, 11534503 + ... + 13981823.

It is an arithmetic number, because the mean of its divisors is an integer number (2838492159192).

Almost surely, 2^{31223320231323} is an apocalyptic number.

31223320231323 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31223320231323 is a deficient number, since it is larger than the sum of its proper divisors (14192554315749).

31223320231323 is a wasteful number, since it uses less digits than its factorization.

31223320231323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833946.

The product of its (nonzero) digits is 23328, while the sum is 30.

Adding to 31223320231323 its reverse (32313202332213), we get a palindrome (63536522563536).

The spelling of 31223320231323 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred twenty million, two hundred thirty-one thousand, three hundred twenty-three".