321889075243 has 2 divisors, whose sum is σ = 321889075244. Its totient is φ = 321889075242.

The previous prime is 321889075153. The next prime is 321889075273. The reversal of 321889075243 is 342570988123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321889075243 is a prime.

It is a super-2 number, since 2×321889075243² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321889075273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160944537621 + 160944537622.

It is an arithmetic number, because the mean of its divisors is an integer number (160944537622).

Almost surely, 2^321889075243 is an apocalyptic number.

321889075243 is a deficient number, since it is larger than the sum of its proper divisors (1).

321889075243 is an equidigital number, since it uses as much as digits as its factorization.

321889075243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 321889075243 in words is "three hundred twenty-one billion, eight hundred eighty-nine million, seventy-five thousand, two hundred forty-three".