311211330989 has 16 divisors (see below), whose sum is σ = 340762767408. Its totient is φ = 282499356672.

The previous prime is 311211330979. The next prime is 311211331001. The reversal of 311211330989 is 989033112113.

It can be written as a sum of positive squares in 8 ways, for example, as 73392228100 + 237819102889 = 270910^2 + 487667^2 .

It is a de Polignac number, because none of the positive numbers 2^k-311211330989 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 (311211330929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588002 + ... + 983955.

It is an arithmetic number, because the mean of its divisors is an integer number (21297672963).

Almost surely, 2^311211330989 is an apocalyptic number.

It is an amenable number.

311211330989 is a deficient number, since it is larger than the sum of its proper divisors (29551436419).

311211330989 is a wasteful number, since it uses less digits than its factorization.

311211330989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572224.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 311211330989 in words is "three hundred eleven billion, two hundred eleven million, three hundred thirty thousand, nine hundred eighty-nine".