31322220229 has 2 divisors, whose sum is σ = 31322220230. Its totient is φ = 31322220228.

The previous prime is 31322220227. The next prime is 31322220277. The reversal of 31322220229 is 92202222313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20113763329 + 11208456900 = 141823^2 + 105870^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322220229 - 2¹ = 31322220227 is a prime.

Together with 31322220227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31322220197 and 31322220206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31322220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661110114 + 15661110115.

It is an arithmetic number, because the mean of its divisors is an integer number (15661110115).

Almost surely, 2^31322220229 is an apocalyptic number.

It is an amenable number.

31322220229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322220229 is an equidigital number, since it uses as much as digits as its factorization.

31322220229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 31322220229 in words is "thirty-one billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twenty-nine".