311000345 has 4 divisors (see below), whose sum is σ = 373200420. Its totient is φ = 248800272.

The previous prime is 311000309. The next prime is 311000351. The reversal of 311000345 is 543000113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543000113 = 239 ⋅2271967.

It can be written as a sum of positive squares in 2 ways, for example, as 231861529 + 79138816 = 15227^2 + 8896^2 .

It is a cyclic number.

It is not a de Polignac number, because 311000345 - 2¹⁴ = 310983961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31100030 + ... + 31100039.

It is an arithmetic number, because the mean of its divisors is an integer number (93300105).

Almost surely, 2^311000345 is an apocalyptic number.

It is an amenable number.

311000345 is a deficient number, since it is larger than the sum of its proper divisors (62200075).

311000345 is an equidigital number, since it uses as much as digits as its factorization.

311000345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62200074.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 311000345 is about 17635.2018701233. The cubic root of 311000345 is about 677.5171457560.

Adding to 311000345 its reverse (543000113), we get a palindrome (854000458).

The spelling of 311000345 in words is "three hundred eleven million, three hundred forty-five", and thus it is an aban number.