31023020550511 has 24 divisors (see below), whose sum is σ = 36253642612320. Its totient is φ = 26467548169920.

The previous prime is 31023020550427. The next prime is 31023020550527. The reversal of 31023020550511 is 11505502032013.

It is not a de Polignac number, because 31023020550511 - 2³³ = 31014430615919 is a prime.

It is a super-2 number, since 2×31023020550511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31023020550511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023020556511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105015996 + ... + 105310993.

It is an arithmetic number, because the mean of its divisors is an integer number (1510568442180).

Almost surely, 2^{31023020550511} is an apocalyptic number.

31023020550511 is a deficient number, since it is larger than the sum of its proper divisors (5230622061809).

31023020550511 is a wasteful number, since it uses less digits than its factorization.

31023020550511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210327087 (or 210327076 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 31023020550511 its reverse (11505502032013), we get a palindrome (42528522582524).

The spelling of 31023020550511 in words is "thirty-one trillion, twenty-three billion, twenty million, five hundred fifty thousand, five hundred eleven".