31203223209947 has 2 divisors, whose sum is σ = 31203223209948. Its totient is φ = 31203223209946.

The previous prime is 31203223209929. The next prime is 31203223210007. The reversal of 31203223209947 is 74990232230213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31203223209947 - 2¹⁰ = 31203223208923 is a prime.

It is a super-2 number, since 2×31203223209947² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31203229209947) 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, 15601611604973 + 15601611604974.

It is an arithmetic number, because the mean of its divisors is an integer number (15601611604974).

Almost surely, 2^{31203223209947} is an apocalyptic number.

31203223209947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203223209947 is an equidigital number, since it uses as much as digits as its factorization.

31203223209947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 31203223209947 in words is "thirty-one trillion, two hundred three billion, two hundred twenty-three million, two hundred nine thousand, nine hundred forty-seven".