311331031040 has 48 divisors (see below), whose sum is σ = 747012078540. Its totient is φ = 124532408320.

The previous prime is 311331031013. The next prime is 311331031049. The reversal of 311331031040 is 40130133113.

It can be written as a sum of positive squares in 2 ways, for example, as 306012537856 + 5318493184 = 553184^2 + 72928^2 .

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

It is not an unprimeable number, because it can be changed into a prime (311331031049) 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, 15191471 + ... + 15211950.

Almost surely, 2^311331031040 is an apocalyptic number.

It is an amenable number.

311331031040 is an abundant number, since it is smaller than the sum of its proper divisors (435681047500).

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

311331031040 is an equidigital number, since it uses as much as digits as its factorization.

311331031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30403448 (or 30403428 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311331031040 its reverse (40130133113), we get a palindrome (351461164153).

The spelling of 311331031040 in words is "three hundred eleven billion, three hundred thirty-one million, thirty-one thousand, forty".