321888172157341 has 2 divisors, whose sum is σ = 321888172157342. Its totient is φ = 321888172157340.

The previous prime is 321888172157249. The next prime is 321888172157347. The reversal of 321888172157341 is 143751271888123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261138166452900 + 60750005704441 = 16159770^2 + 7794229^2 .

It is a cyclic number.

It is not a de Polignac number, because 321888172157341 - 2⁴³ = 313092079135133 is a prime.

It is a super-2 number, since 2×321888172157341² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321888172157341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321888172157347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160944086078670 + 160944086078671.

It is an arithmetic number, because the mean of its divisors is an integer number (160944086078671).

Almost surely, 2^{321888172157341} is an apocalyptic number.

It is an amenable number.

321888172157341 is a deficient number, since it is larger than the sum of its proper divisors (1).

321888172157341 is an equidigital number, since it uses as much as digits as its factorization.

321888172157341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 61.

The spelling of 321888172157341 in words is "three hundred twenty-one trillion, eight hundred eighty-eight billion, one hundred seventy-two million, one hundred fifty-seven thousand, three hundred forty-one".