30531317 has 2 divisors, whose sum is σ = 30531318. Its totient is φ = 30531316.

The previous prime is 30531307. The next prime is 30531353. The reversal of 30531317 is 71313503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24990001 + 5541316 = 4999^2 + 2354^2 .

It is a cyclic number.

It is not a de Polignac number, because 30531317 - 2¹² = 30527221 is a prime.

It is a super-2 number, since 2×30531317² = 1864322635508978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30531292 and 30531301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30531307) 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, 15265658 + 15265659.

It is an arithmetic number, because the mean of its divisors is an integer number (15265659).

Almost surely, 2^30531317 is an apocalyptic number.

It is an amenable number.

30531317 is a deficient number, since it is larger than the sum of its proper divisors (1).

30531317 is an equidigital number, since it uses as much as digits as its factorization.

30531317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 30531317 is about 5525.5150891116. The cubic root of 30531317 is about 312.5468883244.

The spelling of 30531317 in words is "thirty million, five hundred thirty-one thousand, three hundred seventeen".