311440304323421 has 96 divisors (see below), whose sum is σ = 396161880760800. Its totient is φ = 242632831795200.

The previous prime is 311440304323403. The next prime is 311440304323451. The reversal of 311440304323421 is 124323403044113.

It can be written as a sum of positive squares in 16 ways, for example, as 183869830339321 + 127570473984100 = 13559861^2 + 11294710^2 .

It is a de Polignac number, because none of the positive numbers 2^k-311440304323421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311440304323451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 104897372825 + ... + 104897375793.

It is an arithmetic number, because the mean of its divisors is an integer number (4126686257925).

Almost surely, 2^{311440304323421} is an apocalyptic number.

It is an amenable number.

311440304323421 is a deficient number, since it is larger than the sum of its proper divisors (84721576437379).

311440304323421 is a wasteful number, since it uses less digits than its factorization.

311440304323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079 (or 6072 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 311440304323421 its reverse (124323403044113), we get a palindrome (435763707367534).

The spelling of 311440304323421 in words is "three hundred eleven trillion, four hundred forty billion, three hundred four million, three hundred twenty-three thousand, four hundred twenty-one".