531222005 has 4 divisors (see below), whose sum is σ = 637466412. Its totient is φ = 424977600.

The previous prime is 531221963. The next prime is 531222011. The reversal of 531222005 is 500222135.

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 277488964 + 253733041 = 16658^2 + 15929^2 .

It is not a de Polignac number, because 531222005 - 2⁶ = 531221941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53122196 + ... + 53122205.

It is an arithmetic number, because the mean of its divisors is an integer number (159366603).

Almost surely, 2^531222005 is an apocalyptic number.

It is an amenable number.

531222005 is a deficient number, since it is larger than the sum of its proper divisors (106244407).

531222005 is a wasteful number, since it uses less digits than its factorization.

531222005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106244406.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 531222005 is about 23048.2538384147. The cubic root of 531222005 is about 809.8887237271. Note that the first 3 decimals are identical.

The spelling of 531222005 in words is "five hundred thirty-one million, two hundred twenty-two thousand, five".