531242013 has 8 divisors (see below), whose sum is σ = 708700608. Its totient is φ = 353972384.

The previous prime is 531242011. The next prime is 531242029. The reversal of 531242013 is 310242135.

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 531242013 - 2¹ = 531242011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531242011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40545 + ... + 52022.

It is an arithmetic number, because the mean of its divisors is an integer number (88587576).

Almost surely, 2^531242013 is an apocalyptic number.

It is an amenable number.

531242013 is a deficient number, since it is larger than the sum of its proper divisors (177458595).

531242013 is a wasteful number, since it uses less digits than its factorization.

531242013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94483.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 531242013 is about 23048.6878802243. The cubic root of 531242013 is about 809.8988915101.

Adding to 531242013 its reverse (310242135), we get a palindrome (841484148).

The spelling of 531242013 in words is "five hundred thirty-one million, two hundred forty-two thousand, thirteen".