523431505 has 8 divisors (see below), whose sum is σ = 629146152. Its totient is φ = 418059648.

The previous prime is 523431473. The next prime is 523431509. The reversal of 523431505 is 505134325.

523431505 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 28858384 + 494573121 = 5372^2 + 22239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 523431505 - 2⁵ = 523431473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523431509) 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 in 7 ways as a sum of consecutive naturals, for example, 82324 + ... + 88453.

It is an arithmetic number, because the mean of its divisors is an integer number (78643269).

Almost surely, 2^523431505 is an apocalyptic number.

It is an amenable number.

523431505 is a deficient number, since it is larger than the sum of its proper divisors (105714647).

523431505 is a wasteful number, since it uses less digits than its factorization.

523431505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171395.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 523431505 is about 22878.6255050429. The cubic root of 523431505 is about 805.9101391525.

The spelling of 523431505 in words is "five hundred twenty-three million, four hundred thirty-one thousand, five hundred five".