312011645 has 32 divisors (see below), whose sum is σ = 419330304. Its totient is φ = 220953600.

The previous prime is 312011641. The next prime is 312011653. The reversal of 312011645 is 546110213.

It is not a de Polignac number, because 312011645 - 2² = 312011641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312011645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312011641) 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 31 ways as a sum of consecutive naturals, for example, 378704 + ... + 379526.

It is an arithmetic number, because the mean of its divisors is an integer number (13104072).

Almost surely, 2^312011645 is an apocalyptic number.

It is an amenable number.

312011645 is a deficient number, since it is larger than the sum of its proper divisors (107318659).

312011645 is a wasteful number, since it uses less digits than its factorization.

312011645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 312011645 is about 17663.8513637315. The cubic root of 312011645 is about 678.2507266725.

Adding to 312011645 its reverse (546110213), we get a palindrome (858121858).

The spelling of 312011645 in words is "three hundred twelve million, eleven thousand, six hundred forty-five".