31430630634187 has 2 divisors, whose sum is σ = 31430630634188. Its totient is φ = 31430630634186.

The previous prime is 31430630634181. The next prime is 31430630634269. The reversal of 31430630634187 is 78143603603413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31430630634187 - 2⁷ = 31430630634059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31430630634187.

It is not a weakly prime, because it can be changed into another prime (31430630634181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715315317093 + 15715315317094.

It is an arithmetic number, because the mean of its divisors is an integer number (15715315317094).

Almost surely, 2^{31430630634187} is an apocalyptic number.

31430630634187 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430630634187 is an equidigital number, since it uses as much as digits as its factorization.

31430630634187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 31430630634187 in words is "thirty-one trillion, four hundred thirty billion, six hundred thirty million, six hundred thirty-four thousand, one hundred eighty-seven".