531321044220 has 72 divisors (see below), whose sum is σ = 1627321209696. Its totient is φ = 140310018432.

The previous prime is 531321044209. The next prime is 531321044273. The reversal of 531321044220 is 22440123135.

531321044220 is a `hidden beast` number, since 5 + 3 + 1 + 3 + 210 + 442 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14310507 + ... + 14347586.

It is an arithmetic number, because the mean of its divisors is an integer number (22601683468).

Almost surely, 2^531321044220 is an apocalyptic number.

It is an amenable number.

531321044220 is an abundant number, since it is smaller than the sum of its proper divisors (1096000165476).

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

531321044220 is a wasteful number, since it uses less digits than its factorization.

531321044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28658211 (or 28658206 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 531321044220 its reverse (22440123135), we get a palindrome (553761167355).

The spelling of 531321044220 in words is "five hundred thirty-one billion, three hundred twenty-one million, forty-four thousand, two hundred twenty".