531389220 has 24 divisors (see below), whose sum is σ = 1487889984. Its totient is φ = 141703776.

The previous prime is 531389219. The next prime is 531389237. The reversal of 531389220 is 22983135.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4428184 + ... + 4428303.

It is an arithmetic number, because the mean of its divisors is an integer number (61995416).

Almost surely, 2^531389220 is an apocalyptic number.

It is an amenable number.

531389220 is an abundant number, since it is smaller than the sum of its proper divisors (956500764).

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

531389220 is a wasteful number, since it uses less digits than its factorization.

531389220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856499 (or 8856497 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 531389220 is about 23051.8810512288. The cubic root of 531389220 is about 809.9736921802.

The spelling of 531389220 in words is "five hundred thirty-one million, three hundred eighty-nine thousand, two hundred twenty".