31428872888867 has 2 divisors, whose sum is σ = 31428872888868. Its totient is φ = 31428872888866.

The previous prime is 31428872888807. The next prime is 31428872888879. The reversal of 31428872888867 is 76888827882413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31428872888867 - 2¹² = 31428872884771 is a prime.

It is a super-2 number, since 2×31428872888867² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31428872888791 and 31428872888800.

It is not a weakly prime, because it can be changed into another prime (31428872888807) 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, 15714436444433 + 15714436444434.

It is an arithmetic number, because the mean of its divisors is an integer number (15714436444434).

Almost surely, 2^{31428872888867} is an apocalyptic number.

31428872888867 is a deficient number, since it is larger than the sum of its proper divisors (1).

31428872888867 is an equidigital number, since it uses as much as digits as its factorization.

31428872888867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3699376128, while the sum is 80.

The spelling of 31428872888867 in words is "thirty-one trillion, four hundred twenty-eight billion, eight hundred seventy-two million, eight hundred eighty-eight thousand, eight hundred sixty-seven".