312020311 has 4 divisors (see below), whose sum is σ = 312100992. Its totient is φ = 311939632.

The previous prime is 312020257. The next prime is 312020327. The reversal of 312020311 is 113020213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113020213 = 457 ⋅247309.

It is a cyclic number.

It is not a de Polignac number, because 312020311 - 2¹⁹ = 311496023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312020291 and 312020300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312020011) 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, 34231 + ... + 42376.

It is an arithmetic number, because the mean of its divisors is an integer number (78025248).

Almost surely, 2^312020311 is an apocalyptic number.

312020311 is a deficient number, since it is larger than the sum of its proper divisors (80681).

312020311 is an equidigital number, since it uses as much as digits as its factorization.

312020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80680.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 312020311 is about 17664.0966652699. The cubic root of 312020311 is about 678.2570059962.

Adding to 312020311 its reverse (113020213), we get a palindrome (425040524).

The spelling of 312020311 in words is "three hundred twelve million, twenty thousand, three hundred eleven".