531915247 has 2 divisors, whose sum is σ = 531915248. Its totient is φ = 531915246.

The previous prime is 531915229. The next prime is 531915257. The reversal of 531915247 is 742519135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531915247 - 2⁷ = 531915119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531915217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265957623 + 265957624.

It is an arithmetic number, because the mean of its divisors is an integer number (265957624).

Almost surely, 2^531915247 is an apocalyptic number.

531915247 is a deficient number, since it is larger than the sum of its proper divisors (1).

531915247 is an equidigital number, since it uses as much as digits as its factorization.

531915247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 531915247 is about 23063.2878618813. The cubic root of 531915247 is about 810.2408708025.

The spelling of 531915247 in words is "five hundred thirty-one million, nine hundred fifteen thousand, two hundred forty-seven".