531520340 has 48 divisors (see below), whose sum is σ = 1254331008. Its totient is φ = 187718784.

The previous prime is 531520337. The next prime is 531520349. The reversal of 531520340 is 43025135.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531520349) 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, 38462 + ... + 50421.

It is an arithmetic number, because the mean of its divisors is an integer number (26131896).

Almost surely, 2^531520340 is an apocalyptic number.

It is an amenable number.

531520340 is an abundant number, since it is smaller than the sum of its proper divisors (722810668).

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

531520340 is a wasteful number, since it uses less digits than its factorization.

531520340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88928 (or 88926 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 531520340 is about 23054.7248953441. The cubic root of 531520340 is about 810.0403068902.

Adding to 531520340 its reverse (43025135), we get a palindrome (574545475).

The spelling of 531520340 in words is "five hundred thirty-one million, five hundred twenty thousand, three hundred forty".