321867645 has 32 divisors (see below), whose sum is σ = 563397120. Its totient is φ = 155615040.

The previous prime is 321867643. The next prime is 321867649. The reversal of 321867645 is 546768123.

It is not a de Polignac number, because 321867645 - 2¹ = 321867643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321867597 and 321867606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321867641) 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 31 ways as a sum of consecutive naturals, for example, 59962 + ... + 65108.

It is an arithmetic number, because the mean of its divisors is an integer number (17606160).

Almost surely, 2^321867645 is an apocalyptic number.

It is an amenable number.

321867645 is a deficient number, since it is larger than the sum of its proper divisors (241529475).

321867645 is a wasteful number, since it uses less digits than its factorization.

321867645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545.

The product of its digits is 241920, while the sum is 42.

The square root of 321867645 is about 17940.6701379854. The cubic root of 321867645 is about 685.3184765905.

The spelling of 321867645 in words is "three hundred twenty-one million, eight hundred sixty-seven thousand, six hundred forty-five".