321256063 has 4 divisors (see below), whose sum is σ = 323179920. Its totient is φ = 319332208.

The previous prime is 321256057. The next prime is 321256081. The reversal of 321256063 is 360652123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 360652123 = 13 ⋅27742471.

It is a cyclic number.

It is not a de Polignac number, because 321256063 - 2⁹ = 321255551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321256093) 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 3 ways as a sum of consecutive naturals, for example, 961678 + ... + 962011.

It is an arithmetic number, because the mean of its divisors is an integer number (80794980).

Almost surely, 2^321256063 is an apocalyptic number.

321256063 is a deficient number, since it is larger than the sum of its proper divisors (1923857).

321256063 is a wasteful number, since it uses less digits than its factorization.

321256063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923856.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 321256063 is about 17923.6174641170. The cubic root of 321256063 is about 684.8841425879.

The spelling of 321256063 in words is "three hundred twenty-one million, two hundred fifty-six thousand, sixty-three".