531012013 has 4 divisors (see below), whose sum is σ = 606870880. Its totient is φ = 455153148.

The previous prime is 531011993. The next prime is 531012059. The reversal of 531012013 is 310210135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531012013 - 2¹⁷ = 530880941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531012073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37929423 + ... + 37929436.

It is an arithmetic number, because the mean of its divisors is an integer number (151717720).

Almost surely, 2^531012013 is an apocalyptic number.

It is an amenable number.

531012013 is a deficient number, since it is larger than the sum of its proper divisors (75858867).

531012013 is an equidigital number, since it uses as much as digits as its factorization.

531012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75858866.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 531012013 is about 23043.6979020295. The cubic root of 531012013 is about 809.7819933547.

Adding to 531012013 its reverse (310210135), we get a palindrome (841222148).

The spelling of 531012013 in words is "five hundred thirty-one million, twelve thousand, thirteen".