531197440 has 160 divisors (see below), whose sum is σ = 1369019520. Its totient is φ = 197074944.

The previous prime is 531197423. The next prime is 531197449. The reversal of 531197440 is 44791135.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 531197396 and 531197405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531197449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258799 + ... + 3258961.

It is an arithmetic number, because the mean of its divisors is an integer number (8556372).

Almost surely, 2^531197440 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 531197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684509760).

531197440 is an abundant number, since it is smaller than the sum of its proper divisors (837822080).

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

531197440 is a wasteful number, since it uses less digits than its factorization.

531197440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 531197440 is about 23047.7209285430. The cubic root of 531197440 is about 809.8762397920.

The spelling of 531197440 in words is "five hundred thirty-one million, one hundred ninety-seven thousand, four hundred forty".