31473229889891 has 2 divisors, whose sum is σ = 31473229889892. Its totient is φ = 31473229889890.

The previous prime is 31473229889879. The next prime is 31473229889953. The reversal of 31473229889891 is 19898892237413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31473229889891 - 2¹⁴ = 31473229873507 is a prime.

It is a super-3 number, since 3×31473229889891³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (31473229889291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15736614944945 + 15736614944946.

It is an arithmetic number, because the mean of its divisors is an integer number (15736614944946).

Almost surely, 2^{31473229889891} is an apocalyptic number.

31473229889891 is a deficient number, since it is larger than the sum of its proper divisors (1).

31473229889891 is an equidigital number, since it uses as much as digits as its factorization.

31473229889891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376233984, while the sum is 74.

The spelling of 31473229889891 in words is "thirty-one trillion, four hundred seventy-three billion, two hundred twenty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-one".