31430630640143 has 4 divisors (see below), whose sum is σ = 35920720731600. Its totient is φ = 26940540548688.

The previous prime is 31430630640109. The next prime is 31430630640151. The reversal of 31430630640143 is 34104603603413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31430630640143 - 2¹⁸ = 31430630377999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31430630640097 and 31430630640106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430630640943) 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 in 3 ways as a sum of consecutive naturals, for example, 2245045045718 + ... + 2245045045731.

It is an arithmetic number, because the mean of its divisors is an integer number (8980180182900).

Almost surely, 2^{31430630640143} is an apocalyptic number.

31430630640143 is a deficient number, since it is larger than the sum of its proper divisors (4490090091457).

31430630640143 is an equidigital number, since it uses as much as digits as its factorization.

31430630640143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490090091456.

The product of its (nonzero) digits is 186624, while the sum is 38.

The spelling of 31430630640143 in words is "thirty-one trillion, four hundred thirty billion, six hundred thirty million, six hundred forty thousand, one hundred forty-three".