31143312223 has 2 divisors, whose sum is σ = 31143312224. Its totient is φ = 31143312222.

The previous prime is 31143312203. The next prime is 31143312241. The reversal of 31143312223 is 32221334113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31143312223 - 2¹⁷ = 31143181151 is a prime.

It is a super-2 number, since 2×31143312223² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143312203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571656111 + 15571656112.

It is an arithmetic number, because the mean of its divisors is an integer number (15571656112).

Almost surely, 2^31143312223 is an apocalyptic number.

31143312223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143312223 is an equidigital number, since it uses as much as digits as its factorization.

31143312223 is an evil number, because the sum of its binary digits is even.

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

Adding to 31143312223 its reverse (32221334113), we get a palindrome (63364646336).

The spelling of 31143312223 in words is "thirty-one billion, one hundred forty-three million, three hundred twelve thousand, two hundred twenty-three".