531432405 has 24 divisors (see below), whose sum is σ = 1052742912. Its totient is φ = 242940384.

The previous prime is 531432403. The next prime is 531432463. The reversal of 531432405 is 504234135.

It is not a de Polignac number, because 531432405 - 2¹ = 531432403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531432403) 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 23 ways as a sum of consecutive naturals, for example, 843229 + ... + 843858.

It is an arithmetic number, because the mean of its divisors is an integer number (43864288).

Almost surely, 2^531432405 is an apocalyptic number.

It is an amenable number.

531432405 is a deficient number, since it is larger than the sum of its proper divisors (521310507).

531432405 is a wasteful number, since it uses less digits than its factorization.

531432405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687105 (or 1687102 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 531432405 is about 23052.8177236537. The cubic root of 531432405 is about 809.9956332641.

The spelling of 531432405 in words is "five hundred thirty-one million, four hundred thirty-two thousand, four hundred five".