312023221 has 8 divisors (see below), whose sum is σ = 330450624. Its totient is φ = 294000960.

The previous prime is 312023197. The next prime is 312023233. The reversal of 312023221 is 122320213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312023221 - 2⁵ = 312023189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312023195 and 312023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312033221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99700 + ... + 102781.

It is an arithmetic number, because the mean of its divisors is an integer number (41306328).

Almost surely, 2^312023221 is an apocalyptic number.

It is an amenable number.

312023221 is a deficient number, since it is larger than the sum of its proper divisors (18427403).

312023221 is a wasteful number, since it uses less digits than its factorization.

312023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202571.

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

The square root of 312023221 is about 17664.1790355510. The cubic root of 312023221 is about 678.2591145360.

Adding to 312023221 its reverse (122320213), we get a palindrome (434343434).

The spelling of 312023221 in words is "three hundred twelve million, twenty-three thousand, two hundred twenty-one".