311141381 has 2 divisors, whose sum is σ = 311141382. Its totient is φ = 311141380.

The previous prime is 311141339. The next prime is 311141393. The reversal of 311141381 is 183141113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275261281 + 35880100 = 16591^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 311141381 - 2⁶ = 311141317 is a prime.

It is a super-2 number, since 2×311141381² = 193617917941174322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311141581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155570690 + 155570691.

It is an arithmetic number, because the mean of its divisors is an integer number (155570691).

Almost surely, 2^311141381 is an apocalyptic number.

It is an amenable number.

311141381 is a deficient number, since it is larger than the sum of its proper divisors (1).

311141381 is an equidigital number, since it uses as much as digits as its factorization.

311141381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 311141381 is about 17639.2001235884. The cubic root of 311141381 is about 677.6195463578.

Adding to 311141381 its reverse (183141113), we get a palindrome (494282494).

The spelling of 311141381 in words is "three hundred eleven million, one hundred forty-one thousand, three hundred eighty-one".