31323300443 has 2 divisors, whose sum is σ = 31323300444. Its totient is φ = 31323300442.

The previous prime is 31323300331. The next prime is 31323300473. The reversal of 31323300443 is 34400332313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31323300443 - 2¹⁶ = 31323234907 is a prime.

It is a super-2 number, since 2×31323300443² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31323300473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661650221 + 15661650222.

It is an arithmetic number, because the mean of its divisors is an integer number (15661650222).

Almost surely, 2^31323300443 is an apocalyptic number.

31323300443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323300443 is an equidigital number, since it uses as much as digits as its factorization.

31323300443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 31323300443 its reverse (34400332313), we get a palindrome (65723632756).

The spelling of 31323300443 in words is "thirty-one billion, three hundred twenty-three million, three hundred thousand, four hundred forty-three".