531565680 has 160 divisors (see below), whose sum is σ = 1747888128. Its totient is φ = 133401600.

The previous prime is 531565669. The next prime is 531565681. The reversal of 531565680 is 86565135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531565681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274315 + ... + 276245.

Almost surely, 2^531565680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531565680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873944064).

531565680 is an abundant number, since it is smaller than the sum of its proper divisors (1216322448).

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

531565680 is a wasteful number, since it uses less digits than its factorization.

531565680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 531565680 is about 23055.7081869111. The cubic root of 531565680 is about 810.0633390494.

The spelling of 531565680 in words is "five hundred thirty-one million, five hundred sixty-five thousand, six hundred eighty".