531315405 has 12 divisors (see below), whose sum is σ = 920946780. Its totient is φ = 283368192.

The previous prime is 531315371. The next prime is 531315413. The reversal of 531315405 is 504513135.

It can be written as a sum of positive squares in 2 ways, for example, as 357550281 + 173765124 = 18909^2 + 13182^2 .

It is not a de Polignac number, because 531315405 - 2⁸ = 531315149 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 5903460 + ... + 5903549.

It is an arithmetic number, because the mean of its divisors is an integer number (76745565).

Almost surely, 2^531315405 is an apocalyptic number.

It is an amenable number.

531315405 is a deficient number, since it is larger than the sum of its proper divisors (389631375).

531315405 is a wasteful number, since it uses less digits than its factorization.

531315405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807020 (or 11807017 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 531315405 is about 23050.2799332242. The cubic root of 531315405 is about 809.9361861021.

The spelling of 531315405 in words is "five hundred thirty-one million, three hundred fifteen thousand, four hundred five".