531321204 has 12 divisors (see below), whose sum is σ = 1239749504. Its totient is φ = 177107064.

The previous prime is 531321181. The next prime is 531321227. The reversal of 531321204 is 402123135.

It is an interprime number because it is at equal distance from previous prime (531321181) and next prime (531321227).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22138372 + ... + 22138395.

Almost surely, 2^531321204 is an apocalyptic number.

It is an amenable number.

531321204 is an abundant number, since it is smaller than the sum of its proper divisors (708428300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531321204 is a wasteful number, since it uses less digits than its factorization.

531321204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44276774 (or 44276772 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 531321204 is about 23050.4057231104. The cubic root of 531321204 is about 809.9391327529.

Adding to 531321204 its reverse (402123135), we get a palindrome (933444339).

The spelling of 531321204 in words is "five hundred thirty-one million, three hundred twenty-one thousand, two hundred four".