311432444225921 has 2 divisors, whose sum is σ = 311432444225922. Its totient is φ = 311432444225920.

The previous prime is 311432444225899. The next prime is 311432444225927. The reversal of 311432444225921 is 129522444234113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292934178702400 + 18498265523521 = 17115320^2 + 4300961^2 .

It is a cyclic number.

It is not a de Polignac number, because 311432444225921 - 2²² = 311432440031617 is a prime.

It is not a weakly prime, because it can be changed into another prime (311432444225927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155716222112960 + 155716222112961.

It is an arithmetic number, because the mean of its divisors is an integer number (155716222112961).

Almost surely, 2^{311432444225921} is an apocalyptic number.

It is an amenable number.

311432444225921 is a deficient number, since it is larger than the sum of its proper divisors (1).

311432444225921 is an equidigital number, since it uses as much as digits as its factorization.

311432444225921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 47.

The spelling of 311432444225921 in words is "three hundred eleven trillion, four hundred thirty-two billion, four hundred forty-four million, two hundred twenty-five thousand, nine hundred twenty-one".