531776213 has 8 divisors (see below), whose sum is σ = 537969432. Its totient is φ = 525597696.

The previous prime is 531776209. The next prime is 531776221. The reversal of 531776213 is 312677135.

It can be written as a sum of positive squares in 4 ways, for example, as 39025009 + 492751204 = 6247^2 + 22198^2 .

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 531776213 - 2² = 531776209 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 (531775213) 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, 79931 + ... + 86327.

It is an arithmetic number, because the mean of its divisors is an integer number (67246179).

Almost surely, 2^531776213 is an apocalyptic number.

It is an amenable number.

531776213 is a deficient number, since it is larger than the sum of its proper divisors (6193219).

531776213 is an equidigital number, since it uses as much as digits as its factorization.

531776213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7351.

The product of its digits is 26460, while the sum is 35.

The square root of 531776213 is about 23060.2734805986. The cubic root of 531776213 is about 810.1702700527.

The spelling of 531776213 in words is "five hundred thirty-one million, seven hundred seventy-six thousand, two hundred thirteen".