312113645 has 8 divisors (see below), whose sum is σ = 376922904. Its totient is φ = 248099904.

The previous prime is 312113639. The next prime is 312113647. The reversal of 312113645 is 546311213.

It can be written as a sum of positive squares in 4 ways, for example, as 10118761 + 301994884 = 3181^2 + 17378^2 .

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 312113645 - 2²⁴ = 295336429 is a prime.

It is a super-3 number, since 3×312113645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312113647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198014 + ... + 199583.

It is an arithmetic number, because the mean of its divisors is an integer number (47115363).

Almost surely, 2^312113645 is an apocalyptic number.

It is an amenable number.

312113645 is a deficient number, since it is larger than the sum of its proper divisors (64809259).

312113645 is a wasteful number, since it uses less digits than its factorization.

312113645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397759.

The product of its digits is 2160, while the sum is 26.

The square root of 312113645 is about 17666.7383803576. The cubic root of 312113645 is about 678.3246277996.

Adding to 312113645 its reverse (546311213), we get a palindrome (858424858).

The spelling of 312113645 in words is "three hundred twelve million, one hundred thirteen thousand, six hundred forty-five".