311080145 has 4 divisors (see below), whose sum is σ = 373296180. Its totient is φ = 248864112.

The previous prime is 311080097. The next prime is 311080163. The reversal of 311080145 is 541080113.

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 104611984 + 206468161 = 10228^2 + 14369^2 .

It is a cyclic number.

It is not a de Polignac number, because 311080145 - 2²⁸ = 42644689 is a prime.

It is a super-2 number, since 2×311080145² = 193541713226442050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311080145.

It is an unprimeable number.

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, 31108010 + ... + 31108019.

It is an arithmetic number, because the mean of its divisors is an integer number (93324045).

Almost surely, 2^311080145 is an apocalyptic number.

It is an amenable number.

311080145 is a deficient number, since it is larger than the sum of its proper divisors (62216035).

311080145 is an equidigital number, since it uses as much as digits as its factorization.

311080145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62216034.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 311080145 is about 17637.4642451799. The cubic root of 311080145 is about 677.5750891479.

The spelling of 311080145 in words is "three hundred eleven million, eighty thousand, one hundred forty-five".