312344021 has 16 divisors (see below), whose sum is σ = 362050560. Its totient is φ = 266471280.

The previous prime is 312343963. The next prime is 312344029. The reversal of 312344021 is 120443213.

It is a cyclic number.

It is not a de Polignac number, because 312344021 - 2²⁶ = 245235157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312343984 and 312344002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312344029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15380 + ... + 29346.

It is an arithmetic number, because the mean of its divisors is an integer number (22628160).

Almost surely, 2^312344021 is an apocalyptic number.

It is an amenable number.

312344021 is a deficient number, since it is larger than the sum of its proper divisors (49706539).

312344021 is a wasteful number, since it uses less digits than its factorization.

312344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14104.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 312344021 is about 17673.2572266688. The cubic root of 312344021 is about 678.4914807866.

Adding to 312344021 its reverse (120443213), we get a palindrome (432787234).

The spelling of 312344021 in words is "three hundred twelve million, three hundred forty-four thousand, twenty-one".