312421233 has 4 divisors (see below), whose sum is σ = 416561648. Its totient is φ = 208280820.

The previous prime is 312421231. The next prime is 312421243. The reversal of 312421233 is 332124213.

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: 332124213 = 3 ⋅110708071.

It is not a de Polignac number, because 312421233 - 2¹ = 312421231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312421231) 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, 52070203 + ... + 52070208.

It is an arithmetic number, because the mean of its divisors is an integer number (104140412).

Almost surely, 2^312421233 is an apocalyptic number.

It is an amenable number.

312421233 is a deficient number, since it is larger than the sum of its proper divisors (104140415).

312421233 is a wasteful number, since it uses less digits than its factorization.

312421233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104140414.

The product of its digits is 864, while the sum is 21.

The square root of 312421233 is about 17675.4415220667. The cubic root of 312421233 is about 678.5473842824.

Adding to 312421233 its reverse (332124213), we get a palindrome (644545446).

The spelling of 312421233 in words is "three hundred twelve million, four hundred twenty-one thousand, two hundred thirty-three".