531383813 has 8 divisors (see below), whose sum is σ = 535248000. Its totient is φ = 527528080.

The previous prime is 531383701. The next prime is 531383819. The reversal of 531383813 is 318383135.

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 531383813 - 2²⁴ = 514606597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531383819) 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, 175688 + ... + 178686.

It is an arithmetic number, because the mean of its divisors is an integer number (66906000).

Almost surely, 2^531383813 is an apocalyptic number.

It is an amenable number.

531383813 is a deficient number, since it is larger than the sum of its proper divisors (3864187).

531383813 is a wasteful number, since it uses less digits than its factorization.

531383813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227.

The product of its digits is 25920, while the sum is 35.

The square root of 531383813 is about 23051.7637719980. The cubic root of 531383813 is about 809.9709449518.

The spelling of 531383813 in words is "five hundred thirty-one million, three hundred eighty-three thousand, eight hundred thirteen".