311430131331401 has 4 divisors (see below), whose sum is σ = 314640751242132. Its totient is φ = 308219511420672.

The previous prime is 311430131331349. The next prime is 311430131331437. The reversal of 311430131331401 is 104133131034113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202438118205625 + 108992013125776 = 14228075^2 + 10439924^2 .

It is a cyclic number.

It is not a de Polignac number, because 311430131331401 - 2⁶ = 311430131331337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311430131331481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605309955220 + ... + 1605309955413.

It is an arithmetic number, because the mean of its divisors is an integer number (78660187810533).

Almost surely, 2^{311430131331401} is an apocalyptic number.

It is an amenable number.

311430131331401 is a deficient number, since it is larger than the sum of its proper divisors (3210619910731).

311430131331401 is an equidigital number, since it uses as much as digits as its factorization.

311430131331401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210619910730.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 311430131331401 its reverse (104133131034113), we get a palindrome (415563262365514).

The spelling of 311430131331401 in words is "three hundred eleven trillion, four hundred thirty billion, one hundred thirty-one million, three hundred thirty-one thousand, four hundred one".