31123413223 has 4 divisors (see below), whose sum is σ = 35569615120. Its totient is φ = 26677211328.

The previous prime is 31123413151. The next prime is 31123413227. The reversal of 31123413223 is 32231432113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123413223 is a prime.

It is a super-2 number, since 2×31123413223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123413227) 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, 2223100938 + ... + 2223100951.

It is an arithmetic number, because the mean of its divisors is an integer number (8892403780).

Almost surely, 2^31123413223 is an apocalyptic number.

31123413223 is a deficient number, since it is larger than the sum of its proper divisors (4446201897).

31123413223 is an equidigital number, since it uses as much as digits as its factorization.

31123413223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446201896.

The product of its digits is 2592, while the sum is 25.

Adding to 31123413223 its reverse (32231432113), we get a palindrome (63354845336).

The spelling of 31123413223 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirteen thousand, two hundred twenty-three".