31223312303 has 4 divisors (see below), whose sum is σ = 31336032120. Its totient is φ = 31110592488.

The previous prime is 31223312261. The next prime is 31223312339. The reversal of 31223312303 is 30321332213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30321332213 = 72647 ⋅417379.

It is a cyclic number.

It is not a de Polignac number, because 31223312303 - 2¹⁶ = 31223246767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223312903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56359493 + ... + 56360046.

It is an arithmetic number, because the mean of its divisors is an integer number (7834008030).

Almost surely, 2^31223312303 is an apocalyptic number.

31223312303 is a deficient number, since it is larger than the sum of its proper divisors (112719817).

31223312303 is a wasteful number, since it uses less digits than its factorization.

31223312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112719816.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31223312303 its reverse (30321332213), we get a palindrome (61544644516).

The spelling of 31223312303 in words is "thirty-one billion, two hundred twenty-three million, three hundred twelve thousand, three hundred three".