531550540 has 12 divisors (see below), whose sum is σ = 1116256176. Its totient is φ = 212620208.

The previous prime is 531550501. The next prime is 531550549. The reversal of 531550540 is 45055135.

It is a junction number, because it is equal to n+sod(n) for n = 531550499 and 531550508.

It is not an unprimeable number, because it can be changed into a prime (531550549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13288744 + ... + 13288783.

It is an arithmetic number, because the mean of its divisors is an integer number (93021348).

Almost surely, 2^531550540 is an apocalyptic number.

It is an amenable number.

531550540 is an abundant number, since it is smaller than the sum of its proper divisors (584705636).

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

531550540 is a wasteful number, since it uses less digits than its factorization.

531550540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26577536 (or 26577534 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 531550540 is about 23055.3798493974. The cubic root of 531550540 is about 810.0556482623.

It can be divided in two parts, 5315 and 50540, that added together give a palindrome (55855).

The spelling of 531550540 in words is "five hundred thirty-one million, five hundred fifty thousand, five hundred forty".