311131031401 has 4 divisors (see below), whose sum is σ = 311134971204. Its totient is φ = 311127091600.

The previous prime is 311131031399. The next prime is 311131031423. The reversal of 311131031401 is 104130131113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104130131113 = 2137 ⋅48727249.

It can be written as a sum of positive squares in 2 ways, for example, as 37811191401 + 273319840000 = 194451^2 + 522800^2 .

It is a cyclic number.

It is not a de Polignac number, because 311131031401 - 2¹ = 311131031399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311131031501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848970 + ... + 2010211.

It is an arithmetic number, because the mean of its divisors is an integer number (77783742801).

Almost surely, 2^311131031401 is an apocalyptic number.

It is an amenable number.

311131031401 is a deficient number, since it is larger than the sum of its proper divisors (3939803).

311131031401 is an equidigital number, since it uses as much as digits as its factorization.

311131031401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939802.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 311131031401 its reverse (104130131113), we get a palindrome (415261162514).

The spelling of 311131031401 in words is "three hundred eleven billion, one hundred thirty-one million, thirty-one thousand, four hundred one".