311555345 has 8 divisors (see below), whose sum is σ = 395858664. Its totient is φ = 234582784.

The previous prime is 311555333. The next prime is 311555347. The reversal of 311555345 is 543555113.

It can be written as a sum of positive squares in 4 ways, for example, as 4464769 + 307090576 = 2113^2 + 17524^2 .

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 311555345 - 2¹⁶ = 311489809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311555347) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1832594 + ... + 1832763.

It is an arithmetic number, because the mean of its divisors is an integer number (49482333).

Almost surely, 2^311555345 is an apocalyptic number.

It is an amenable number.

311555345 is a deficient number, since it is larger than the sum of its proper divisors (84303319).

311555345 is a wasteful number, since it uses less digits than its factorization.

311555345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665379.

The product of its digits is 22500, while the sum is 32.

The square root of 311555345 is about 17650.9304287338. The cubic root of 311555345 is about 677.9199304742.

The spelling of 311555345 in words is "three hundred eleven million, five hundred fifty-five thousand, three hundred forty-five".