312012223 has 4 divisors (see below), whose sum is σ = 313999720. Its totient is φ = 310024728.

The previous prime is 312012209. The next prime is 312012251. The reversal of 312012223 is 322210213.

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 312012223 - 2⁵ = 312012191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312012197 and 312012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312016223) 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, 993513 + ... + 993826.

It is an arithmetic number, because the mean of its divisors is an integer number (78499930).

Almost surely, 2^312012223 is an apocalyptic number.

312012223 is a deficient number, since it is larger than the sum of its proper divisors (1987497).

312012223 is a wasteful number, since it uses less digits than its factorization.

312012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987496.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312012223 is about 17663.8677248218. The cubic root of 312012223 is about 678.2511454909.

Adding to 312012223 its reverse (322210213), we get a palindrome (634222436).

The spelling of 312012223 in words is "three hundred twelve million, twelve thousand, two hundred twenty-three".