31404514187 has 2 divisors, whose sum is σ = 31404514188. Its totient is φ = 31404514186.

The previous prime is 31404514151. The next prime is 31404514237. The reversal of 31404514187 is 78141540413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31404514187 - 2⁶ = 31404514123 is a prime.

It is a super-2 number, since 2×31404514187² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31404514187.

It is not a weakly prime, because it can be changed into another prime (31404514117) 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, 15702257093 + 15702257094.

It is an arithmetic number, because the mean of its divisors is an integer number (15702257094).

Almost surely, 2^31404514187 is an apocalyptic number.

31404514187 is a deficient number, since it is larger than the sum of its proper divisors (1).

31404514187 is an equidigital number, since it uses as much as digits as its factorization.

31404514187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 31404514187 in words is "thirty-one billion, four hundred four million, five hundred fourteen thousand, one hundred eighty-seven".