311339945 has 8 divisors (see below), whose sum is σ = 426980544. Its totient is φ = 213490224.

The previous prime is 311339939. The next prime is 311339953. The reversal of 311339945 is 549933113.

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 311339945 - 2⁴ = 311339929 is a prime.

It is a super-2 number, since 2×311339945² = 193865122705206050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 311339899 and 311339908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4447679 + ... + 4447748.

It is an arithmetic number, because the mean of its divisors is an integer number (53372568).

Almost surely, 2^311339945 is an apocalyptic number.

311339945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

311339945 is a deficient number, since it is larger than the sum of its proper divisors (115640599).

311339945 is an equidigital number, since it uses as much as digits as its factorization.

311339945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8895439.

The product of its digits is 43740, while the sum is 38.

The square root of 311339945 is about 17644.8277123921. The cubic root of 311339945 is about 677.7636633021.

The spelling of 311339945 in words is "three hundred eleven million, three hundred thirty-nine thousand, nine hundred forty-five".