531643120 has 40 divisors (see below), whose sum is σ = 1237202064. Its totient is φ = 212462592.

The previous prime is 531643117. The next prime is 531643127. The reversal of 531643120 is 21346135.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531643127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111832 + ... + 116488.

Almost surely, 2^531643120 is an apocalyptic number.

It is an amenable number.

531643120 is an abundant number, since it is smaller than the sum of its proper divisors (705558944).

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

531643120 is a wasteful number, since it uses less digits than its factorization.

531643120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097 (or 6091 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 531643120 is about 23057.3875363190. The cubic root of 531643120 is about 810.1026745830.

Adding to 531643120 its reverse (21346135), we get a palindrome (552989255).

The spelling of 531643120 in words is "five hundred thirty-one million, six hundred forty-three thousand, one hundred twenty".