531313140 has 96 divisors (see below), whose sum is σ = 1514822400. Its totient is φ = 139124736.

The previous prime is 531313099. The next prime is 531313151. The reversal of 531313140 is 41313135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 920532 + ... + 921108.

It is an arithmetic number, because the mean of its divisors is an integer number (15779400).

Almost surely, 2^531313140 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 531313140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757411200).

531313140 is an abundant number, since it is smaller than the sum of its proper divisors (983509260).

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

531313140 is a wasteful number, since it uses less digits than its factorization.

531313140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 531313140 is about 23050.2308014475. The cubic root of 531313140 is about 809.9350351799.

Adding to 531313140 its reverse (41313135), we get a palindrome (572626275).

The spelling of 531313140 in words is "five hundred thirty-one million, three hundred thirteen thousand, one hundred forty".