31011212163 has 8 divisors (see below), whose sum is σ = 41556064000. Its totient is φ = 20570250888.

The previous prime is 31011212161. The next prime is 31011212207. The reversal of 31011212163 is 36121211013.

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

It is not a de Polignac number, because 31011212163 - 2¹ = 31011212161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25971943 + ... + 25973136.

It is an arithmetic number, because the mean of its divisors is an integer number (5194508000).

Almost surely, 2^31011212163 is an apocalyptic number.

31011212163 is a deficient number, since it is larger than the sum of its proper divisors (10544851837).

31011212163 is a wasteful number, since it uses less digits than its factorization.

31011212163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51945281.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31011212163 its reverse (36121211013), we get a palindrome (67132423176).

The spelling of 31011212163 in words is "thirty-one billion, eleven million, two hundred twelve thousand, one hundred sixty-three".