531555164 has 48 divisors (see below), whose sum is σ = 1097741568. Its totient is φ = 220485888.

The previous prime is 531555161. The next prime is 531555173. The reversal of 531555164 is 461555135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531555161) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 134099 + ... + 138005.

It is an arithmetic number, because the mean of its divisors is an integer number (22869616).

Almost surely, 2^531555164 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 531555164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548870784).

531555164 is an abundant number, since it is smaller than the sum of its proper divisors (566186404).

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

531555164 is a wasteful number, since it uses less digits than its factorization.

531555164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074 (or 4072 counting only the distinct ones).

The product of its digits is 45000, while the sum is 35.

The square root of 531555164 is about 23055.4801294616. The cubic root of 531555164 is about 810.0579971682.

The spelling of 531555164 in words is "five hundred thirty-one million, five hundred fifty-five thousand, one hundred sixty-four".