312311219 has 4 divisors (see below), whose sum is σ = 340703160. Its totient is φ = 283919280.

The previous prime is 312311183. The next prime is 312311239. The reversal of 312311219 is 912113213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312311219 - 2²⁰ = 311262643 is a prime.

It is a super-2 number, since 2×312311219² = 195076595026531922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312311194 and 312311203.

It is not an unprimeable number, because it can be changed into a prime (312311239) 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, 14195954 + ... + 14195975.

It is an arithmetic number, because the mean of its divisors is an integer number (85175790).

Almost surely, 2^312311219 is an apocalyptic number.

312311219 is a deficient number, since it is larger than the sum of its proper divisors (28391941).

312311219 is a wasteful number, since it uses less digits than its factorization.

312311219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28391940.

The product of its digits is 324, while the sum is 23.

The square root of 312311219 is about 17672.3291900078. The cubic root of 312311219 is about 678.4677284973.

The spelling of 312311219 in words is "three hundred twelve million, three hundred eleven thousand, two hundred nineteen".