531320417 has 2 divisors, whose sum is σ = 531320418. Its totient is φ = 531320416.

The previous prime is 531320399. The next prime is 531320423. The reversal of 531320417 is 714023135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443692096 + 87628321 = 21064^2 + 9361^2 .

It is a cyclic number.

It is not a de Polignac number, because 531320417 - 2²² = 527126113 is a prime.

It is not a weakly prime, because it can be changed into another prime (531320017) 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, 265660208 + 265660209.

It is an arithmetic number, because the mean of its divisors is an integer number (265660209).

Almost surely, 2^531320417 is an apocalyptic number.

It is an amenable number.

531320417 is a deficient number, since it is larger than the sum of its proper divisors (1).

531320417 is an equidigital number, since it uses as much as digits as its factorization.

531320417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 531320417 is about 23050.3886518210. The cubic root of 531320417 is about 809.9387328552.

The spelling of 531320417 in words is "five hundred thirty-one million, three hundred twenty thousand, four hundred seventeen".