31143033311 has 16 divisors (see below), whose sum is σ = 34454997024. Its totient is φ = 27962423424.

The previous prime is 31143033283. The next prime is 31143033319. The reversal of 31143033311 is 11333034113.

It is not a de Polignac number, because 31143033311 - 2¹⁰ = 31143032287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143033319) 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 15 ways as a sum of consecutive naturals, for example, 2223416 + ... + 2237378.

It is an arithmetic number, because the mean of its divisors is an integer number (2153437314).

Almost surely, 2^31143033311 is an apocalyptic number.

31143033311 is a deficient number, since it is larger than the sum of its proper divisors (3311963713).

31143033311 is a wasteful number, since it uses less digits than its factorization.

31143033311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18650.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31143033311 its reverse (11333034113), we get a palindrome (42476067424).

The spelling of 31143033311 in words is "thirty-one billion, one hundred forty-three million, thirty-three thousand, three hundred eleven".