312322213 has 4 divisors (see below), whose sum is σ = 356939680. Its totient is φ = 267704748.

The previous prime is 312322183. The next prime is 312322261. The reversal of 312322213 is 312223213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312223213 = 6679 ⋅46747.

It is a cyclic number.

It is not a de Polignac number, because 312322213 - 2²⁵ = 278767781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312322273) 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, 22308723 + ... + 22308736.

It is an arithmetic number, because the mean of its divisors is an integer number (89234920).

Almost surely, 2^312322213 is an apocalyptic number.

It is an amenable number.

312322213 is a deficient number, since it is larger than the sum of its proper divisors (44617467).

312322213 is an equidigital number, since it uses as much as digits as its factorization.

312322213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44617466.

The product of its digits is 432, while the sum is 19.

The square root of 312322213 is about 17672.6402385156. The cubic root of 312322213 is about 678.4756895590.

Adding to 312322213 its reverse (312223213), we get a palindrome (624545426).

The spelling of 312322213 in words is "three hundred twelve million, three hundred twenty-two thousand, two hundred thirteen".