31133243000 has 128 divisors (see below), whose sum is σ = 75066264000. Its totient is φ = 12076992000.

The previous prime is 31133242969. The next prime is 31133243017. The reversal of 31133243000 is 34233113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12911795 + ... + 12914205.

Almost surely, 2^31133243000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31133243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37533132000).

31133243000 is an abundant number, since it is smaller than the sum of its proper divisors (43933021000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31133243000 is a wasteful number, since it uses less digits than its factorization.

31133243000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31133243000 its reverse (34233113), we get a palindrome (31167476113).

The spelling of 31133243000 in words is "thirty-one billion, one hundred thirty-three million, two hundred forty-three thousand".