31000219223 has 2 divisors, whose sum is σ = 31000219224. Its totient is φ = 31000219222.

The previous prime is 31000219193. The next prime is 31000219303. The reversal of 31000219223 is 32291200013.

It is a weak prime.

It is an emirp because it is prime and its reverse (32291200013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31000219223 - 2²⁸ = 30731783767 is a prime.

It is a super-2 number, since 2×31000219223² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000119223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500109611 + 15500109612.

It is an arithmetic number, because the mean of its divisors is an integer number (15500109612).

Almost surely, 2^31000219223 is an apocalyptic number.

31000219223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000219223 is an equidigital number, since it uses as much as digits as its factorization.

31000219223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31000219223 its reverse (32291200013), we get a palindrome (63291419236).

The spelling of 31000219223 in words is "thirty-one billion, two hundred nineteen thousand, two hundred twenty-three".