31000002223 has 2 divisors, whose sum is σ = 31000002224. Its totient is φ = 31000002222.

The previous prime is 31000002221. The next prime is 31000002227. The reversal of 31000002223 is 32220000013.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31000002223 - 2¹ = 31000002221 is a prime.

It is a super-2 number, since 2×31000002223² (a number of 22 digits) contains 22 as substring.

Together with 31000002221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000002221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500001111 + 15500001112.

It is an arithmetic number, because the mean of its divisors is an integer number (15500001112).

Almost surely, 2^31000002223 is an apocalyptic number.

31000002223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000002223 is an equidigital number, since it uses as much as digits as its factorization.

31000002223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 31000002223 its reverse (32220000013), we get a palindrome (63220002236).

The spelling of 31000002223 in words is "thirty-one billion, two thousand, two hundred twenty-three".