531313340 has 192 divisors, whose sum is σ = 1323786240. Its totient is φ = 177914880.

The previous prime is 531313331. The next prime is 531313351. The reversal of 531313340 is 43313135.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10024754 + ... + 10024806.

It is an arithmetic number, because the mean of its divisors is an integer number (6894720).

Almost surely, 2^531313340 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 531313340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661893120).

531313340 is an abundant number, since it is smaller than the sum of its proper divisors (792472900).

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

531313340 is a wasteful number, since it uses less digits than its factorization.

531313340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 531313340 is about 23050.2351397985. The cubic root of 531313340 is about 809.9351368067.

Adding to 531313340 its reverse (43313135), we get a palindrome (574626475).

The spelling of 531313340 in words is "five hundred thirty-one million, three hundred thirteen thousand, three hundred forty".