311311145 has 24 divisors (see below), whose sum is σ = 392179392. Its totient is φ = 237172320.

The previous prime is 311311139. The next prime is 311311177. The reversal of 311311145 is 541113113.

It is not a de Polignac number, because 311311145 - 2¹² = 311307049 is a prime.

It is a super-2 number, since 2×311311145² = 193829258002422050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321452 + ... + 322418.

It is an arithmetic number, because the mean of its divisors is an integer number (16340808).

Almost surely, 2^311311145 is an apocalyptic number.

It is an amenable number.

311311145 is a deficient number, since it is larger than the sum of its proper divisors (80868247).

311311145 is an equidigital number, since it uses as much as digits as its factorization.

311311145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1070 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 311311145 is about 17644.0115903385. The cubic root of 311311145 is about 677.7427641791.

Adding to 311311145 its reverse (541113113), we get a palindrome (852424258).

The spelling of 311311145 in words is "three hundred eleven million, three hundred eleven thousand, one hundred forty-five".