531325340040 has 64 divisors (see below), whose sum is σ = 1738882935360. Its totient is φ = 128806142720.

The previous prime is 531325340023. The next prime is 531325340053. The reversal of 531325340040 is 40043523135.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201258279 + ... + 201260918.

It is an arithmetic number, because the mean of its divisors is an integer number (27170045865).

Almost surely, 2^531325340040 is an apocalyptic number.

It is an amenable number.

531325340040 is an abundant number, since it is smaller than the sum of its proper divisors (1207557595320).

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

531325340040 is a wasteful number, since it uses less digits than its factorization.

531325340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402519222 (or 402519218 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 531325340040 its reverse (40043523135), we get a palindrome (571368863175).

The spelling of 531325340040 in words is "five hundred thirty-one billion, three hundred twenty-five million, three hundred forty thousand, forty".