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BaseRepresentation
bin100011011111000011111011…
…1100010011100000010110001
31111221011120001110002021000001
41012332013313202130002301
5311402433433143133241
63023503334304430001
7122513546436143506
oct10676076742340261
91457146043067001
10312132311302321
119050062a504064
122b0113bb618301
1310521c4879a923
152614427498431
hex11be1f789c0b1

312132311302321 has 4 divisors (see below), whose sum is σ = 312132631910692. Its totient is φ = 312131990693952.

The previous prime is 312132311302307. The next prime is 312132311302333. The reversal of 312132311302321 is 123203113231213.

Adding to 312132311302321 its reverse (123203113231213), we get a palindrome (435335424533534).

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 172283711724721 + 139848599577600 = 13125689^2 + 11825760^2 .

It is a cyclic number.

It is not a de Polignac number, because 312132311302321 - 215 = 312132311269553 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 312132311302321.

It is not an unprimeable number, because it can be changed into a prime (312132311302921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158839380 + ... + 160792453.

It is an arithmetic number, because the mean of its divisors is an integer number (78033157977673).

Almost surely, 2312132311302321 is an apocalyptic number.

It is an amenable number.

312132311302321 is a deficient number, since it is larger than the sum of its proper divisors (320608371).

312132311302321 is an equidigital number, since it uses as much as digits as its factorization.

312132311302321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320608370.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 312132311302321 in words is "three hundred twelve trillion, one hundred thirty-two billion, three hundred eleven million, three hundred two thousand, three hundred twenty-one".

Divisors: 1 976537 319631833 312132311302321