311054021 has 4 divisors (see below), whose sum is σ = 314549100. Its totient is φ = 307558944.

The previous prime is 311054011. The next prime is 311054057. The reversal of 311054021 is 120450113.

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 47803396 + 263250625 = 6914^2 + 16225^2 .

It is a cyclic number.

It is not a de Polignac number, because 311054021 - 2¹⁰ = 311052997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311054011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747406 + ... + 1747583.

It is an arithmetic number, because the mean of its divisors is an integer number (78637275).

Almost surely, 2^311054021 is an apocalyptic number.

It is an amenable number.

311054021 is a deficient number, since it is larger than the sum of its proper divisors (3495079).

311054021 is an equidigital number, since it uses as much as digits as its factorization.

311054021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495078.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 311054021 is about 17636.7236469816. The cubic root of 311054021 is about 677.5561214023.

The spelling of 311054021 in words is "three hundred eleven million, fifty-four thousand, twenty-one".