311420209 has 8 divisors (see below), whose sum is σ = 318109032. Its totient is φ = 304761600.

The previous prime is 311420173. The next prime is 311420227. The reversal of 311420209 is 902024113.

It can be written as a sum of positive squares in 4 ways, for example, as 225450225 + 85969984 = 15015^2 + 9272^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311420209 - 2¹¹ = 311418161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311420209.

It is not an unprimeable number, because it can be changed into a prime (311420609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13927 + ... + 28579.

It is an arithmetic number, because the mean of its divisors is an integer number (39763629).

Almost surely, 2^311420209 is an apocalyptic number.

It is an amenable number.

311420209 is a deficient number, since it is larger than the sum of its proper divisors (6688823).

311420209 is a wasteful number, since it uses less digits than its factorization.

311420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15107.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 311420209 is about 17647.1020000452. The cubic root of 311420209 is about 677.8219011965.

The spelling of 311420209 in words is "three hundred eleven million, four hundred twenty thousand, two hundred nine".