531351040 has 80 divisors (see below), whose sum is σ = 1389888720. Its totient is φ = 193208320.

The previous prime is 531350993. The next prime is 531351047. The reversal of 531351040 is 40153135.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531351047) 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, 18726 + ... + 37594.

It is an arithmetic number, because the mean of its divisors is an integer number (17373609).

Almost surely, 2^531351040 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 531351040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694944360).

531351040 is an abundant number, since it is smaller than the sum of its proper divisors (858537680).

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

531351040 is a wasteful number, since it uses less digits than its factorization.

531351040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18903 (or 18887 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 531351040 is about 23051.0529043686. The cubic root of 531351040 is about 809.9542930059.

The spelling of 531351040 in words is "five hundred thirty-one million, three hundred fifty-one thousand, forty".