312163321 has 4 divisors (see below), whose sum is σ = 312282100. Its totient is φ = 312044544.

The previous prime is 312163307. The next prime is 312163349. The reversal of 312163321 is 123361213.

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 79905721 + 232257600 = 8939^2 + 15240^2 .

It is a cyclic number.

It is not a de Polignac number, because 312163321 - 2⁵ = 312163289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312163292 and 312163301.

It is not an unprimeable number, because it can be changed into a prime (312163301) 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, 55356 + ... + 60733.

It is an arithmetic number, because the mean of its divisors is an integer number (78070525).

Almost surely, 2^312163321 is an apocalyptic number.

It is an amenable number.

312163321 is a deficient number, since it is larger than the sum of its proper divisors (118779).

312163321 is a wasteful number, since it uses less digits than its factorization.

312163321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118778.

The product of its digits is 648, while the sum is 22.

The square root of 312163321 is about 17668.1442432418. The cubic root of 312163321 is about 678.3606132675.

The spelling of 312163321 in words is "three hundred twelve million, one hundred sixty-three thousand, three hundred twenty-one".