311054981 has 2 divisors, whose sum is σ = 311054982. Its totient is φ = 311054980.

The previous prime is 311054969. The next prime is 311055007. The reversal of 311054981 is 189450113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277888900 + 33166081 = 16670^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 311054981 - 2¹⁴ = 311038597 is a prime.

It is a super-3 number, since 3×311054981³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311054581) 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, 155527490 + 155527491.

It is an arithmetic number, because the mean of its divisors is an integer number (155527491).

Almost surely, 2^311054981 is an apocalyptic number.

It is an amenable number.

311054981 is a deficient number, since it is larger than the sum of its proper divisors (1).

311054981 is an equidigital number, since it uses as much as digits as its factorization.

311054981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 311054981 is about 17636.7508628999. The cubic root of 311054981 is about 677.5568184444.

The spelling of 311054981 in words is "three hundred eleven million, fifty-four thousand, nine hundred eighty-one".