31143404866 has 8 divisors (see below), whose sum is σ = 53388694080. Its totient is φ = 13347173508.

The previous prime is 31143404797. The next prime is 31143404869. The reversal of 31143404866 is 66840434113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31143404869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112264446 + ... + 1112264473.

It is an arithmetic number, because the mean of its divisors is an integer number (6673586760).

Almost surely, 2^31143404866 is an apocalyptic number.

31143404866 is a deficient number, since it is larger than the sum of its proper divisors (22245289214).

31143404866 is a wasteful number, since it uses less digits than its factorization.

31143404866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224528928.

The product of its (nonzero) digits is 165888, while the sum is 40.

Adding to 31143404866 its reverse (66840434113), we get a palindrome (97983838979).

The spelling of 31143404866 in words is "thirty-one billion, one hundred forty-three million, four hundred four thousand, eight hundred sixty-six".