531242429 has 4 divisors (see below), whose sum is σ = 531866076. Its totient is φ = 530618784.

The previous prime is 531242417. The next prime is 531242449. The reversal of 531242429 is 924242135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 924242135 = 5 ⋅184848427.

It can be written as a sum of positive squares in 2 ways, for example, as 301022500 + 230219929 = 17350^2 + 15173^2 .

It is a cyclic number.

It is not a de Polignac number, because 531242429 - 2²⁴ = 514465213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531242395 and 531242404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531242449) 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 in 3 ways as a sum of consecutive naturals, for example, 310544 + ... + 312249.

It is an arithmetic number, because the mean of its divisors is an integer number (132966519).

Almost surely, 2^531242429 is an apocalyptic number.

It is an amenable number.

531242429 is a deficient number, since it is larger than the sum of its proper divisors (623647).

531242429 is an equidigital number, since it uses as much as digits as its factorization.

531242429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623646.

The product of its digits is 17280, while the sum is 32.

The square root of 531242429 is about 23048.6969045974. The cubic root of 531242429 is about 809.8991029127.

The spelling of 531242429 in words is "five hundred thirty-one million, two hundred forty-two thousand, four hundred twenty-nine".