311985245 has 16 divisors (see below), whose sum is σ = 439834752. Its totient is φ = 209444160.

The previous prime is 311985239. The next prime is 311985257. The reversal of 311985245 is 542589113.

It is a happy number.

It is not a de Polignac number, because 311985245 - 2¹⁴ = 311968861 is a prime.

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 = 311985199 and 311985208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217457 + ... + 218886.

It is an arithmetic number, because the mean of its divisors is an integer number (27489672).

Almost surely, 2^311985245 is an apocalyptic number.

It is an amenable number.

311985245 is a deficient number, since it is larger than the sum of its proper divisors (127849507).

311985245 is a wasteful number, since it uses less digits than its factorization.

311985245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436372.

The product of its digits is 43200, while the sum is 38.

The square root of 311985245 is about 17663.1040590265. The cubic root of 311985245 is about 678.2315966982.

The spelling of 311985245 in words is "three hundred eleven million, nine hundred eighty-five thousand, two hundred forty-five".