531210020 has 24 divisors (see below), whose sum is σ = 1216954368. Its totient is φ = 193167200.

The previous prime is 531209957. The next prime is 531210049. The reversal of 531210020 is 20012135.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 531209977 and 531210004.

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 7 ways as a sum of consecutive naturals, for example, 1207076 + ... + 1207515.

It is an arithmetic number, because the mean of its divisors is an integer number (50706432).

Almost surely, 2^531210020 is an apocalyptic number.

It is an amenable number.

531210020 is an abundant number, since it is smaller than the sum of its proper divisors (685744348).

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

531210020 is a wasteful number, since it uses less digits than its factorization.

531210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414611 (or 2414609 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 531210020 is about 23047.9938389440. The cubic root of 531210020 is about 809.8826329972.

Adding to 531210020 its reverse (20012135), we get a palindrome (551222155).

The spelling of 531210020 in words is "five hundred thirty-one million, two hundred ten thousand, twenty".