321355864 has 8 divisors (see below), whose sum is σ = 602542260. Its totient is φ = 160677928.

The previous prime is 321355861. The next prime is 321355877. The reversal of 321355864 is 468553123.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×321355864³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321355861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20084734 + ... + 20084749.

Almost surely, 2^321355864 is an apocalyptic number.

It is an amenable number.

321355864 is a deficient number, since it is larger than the sum of its proper divisors (281186396).

321355864 is a wasteful number, since it uses less digits than its factorization.

321355864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40169489 (or 40169485 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 321355864 is about 17926.4013120314. The cubic root of 321355864 is about 684.9550569906.

The spelling of 321355864 in words is "three hundred twenty-one million, three hundred fifty-five thousand, eight hundred sixty-four".