31223030329 has 2 divisors, whose sum is σ = 31223030330. Its totient is φ = 31223030328.

The previous prime is 31223030291. The next prime is 31223030341. The reversal of 31223030329 is 92303032213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19089567225 + 12133463104 = 138165^2 + 110152^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223030329 - 2¹¹ = 31223028281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31223030297 and 31223030306.

It is not a weakly prime, because it can be changed into another prime (1223030329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611515164 + 15611515165.

It is an arithmetic number, because the mean of its divisors is an integer number (15611515165).

Almost surely, 2^31223030329 is an apocalyptic number.

It is an amenable number.

31223030329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223030329 is an equidigital number, since it uses as much as digits as its factorization.

31223030329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

The spelling of 31223030329 in words is "thirty-one billion, two hundred twenty-three million, thirty thousand, three hundred twenty-nine".