321130517 has 2 divisors, whose sum is σ = 321130518. Its totient is φ = 321130516.

The previous prime is 321130507. The next prime is 321130583. The reversal of 321130517 is 715031123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230766481 + 90364036 = 15191^2 + 9506^2 .

It is a cyclic number.

It is not a de Polignac number, because 321130517 - 2⁸ = 321130261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321130492 and 321130501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321130507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565258 + 160565259.

It is an arithmetic number, because the mean of its divisors is an integer number (160565259).

Almost surely, 2^321130517 is an apocalyptic number.

It is an amenable number.

321130517 is a deficient number, since it is larger than the sum of its proper divisors (1).

321130517 is an equidigital number, since it uses as much as digits as its factorization.

321130517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 321130517 is about 17920.1148712836. The cubic root of 321130517 is about 684.7949140070.

The spelling of 321130517 in words is "three hundred twenty-one million, one hundred thirty thousand, five hundred seventeen".