323515145381 has 2 divisors, whose sum is σ = 323515145382. Its totient is φ = 323515145380.

The previous prime is 323515145357. The next prime is 323515145383. The reversal of 323515145381 is 183541515323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301850249281 + 21664896100 = 549409^2 + 147190^2 .

It is a cyclic number.

It is not a de Polignac number, because 323515145381 - 2¹⁴ = 323515128997 is a prime.

It is a super-2 number, since 2×323515145381² (a number of 24 digits) contains 22 as substring.

Together with 323515145383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323515145383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161757572690 + 161757572691.

It is an arithmetic number, because the mean of its divisors is an integer number (161757572691).

Almost surely, 2^323515145381 is an apocalyptic number.

It is an amenable number.

323515145381 is a deficient number, since it is larger than the sum of its proper divisors (1).

323515145381 is an equidigital number, since it uses as much as digits as its factorization.

323515145381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 41.

The spelling of 323515145381 in words is "three hundred twenty-three billion, five hundred fifteen million, one hundred forty-five thousand, three hundred eighty-one".