531135013 has 4 divisors (see below), whose sum is σ = 532154988. Its totient is φ = 530115040.

The previous prime is 531134993. The next prime is 531135019. The reversal of 531135013 is 310531135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61199329 + 469935684 = 7823^2 + 21678^2 .

It is a cyclic number.

It is not a de Polignac number, because 531135013 - 2²⁵ = 497580581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531135019) 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, 509206 + ... + 510247.

It is an arithmetic number, because the mean of its divisors is an integer number (133038747).

Almost surely, 2^531135013 is an apocalyptic number.

It is an amenable number.

531135013 is a deficient number, since it is larger than the sum of its proper divisors (1019975).

531135013 is a wasteful number, since it uses less digits than its factorization.

531135013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019974.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 531135013 is about 23046.3665899855. The cubic root of 531135013 is about 809.8445126532.

Adding to 531135013 its reverse (310531135), we get a palindrome (841666148).

The spelling of 531135013 in words is "five hundred thirty-one million, one hundred thirty-five thousand, thirteen".