531218260 has 24 divisors (see below), whose sum is σ = 1129002336. Its totient is φ = 209926560.

The previous prime is 531218257. The next prime is 531218273. The reversal of 531218260 is 62812135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158346 + ... + 161665.

It is an arithmetic number, because the mean of its divisors is an integer number (47041764).

Almost surely, 2^531218260 is an apocalyptic number.

It is an amenable number.

531218260 is an abundant number, since it is smaller than the sum of its proper divisors (597784076).

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

531218260 is a wasteful number, since it uses less digits than its factorization.

531218260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320103 (or 320101 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 531218260 is about 23048.1725956745. The cubic root of 531218260 is about 809.8868205427.

It can be divided in two parts, 531 and 218260, that added together give a triangular number (218791 = T₆₆₁).

The spelling of 531218260 in words is "five hundred thirty-one million, two hundred eighteen thousand, two hundred sixty".