531004530 has 64 divisors (see below), whose sum is σ = 1492017408. Its totient is φ = 118410240.

The previous prime is 531004493. The next prime is 531004531. The reversal of 531004530 is 35400135.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 531004497 and 531004506.

It is not an unprimeable number, because it can be changed into a prime (531004531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22227 + ... + 39446.

It is an arithmetic number, because the mean of its divisors is an integer number (23312772).

Almost surely, 2^531004530 is an apocalyptic number.

531004530 is an abundant number, since it is smaller than the sum of its proper divisors (961012878).

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

531004530 is a wasteful number, since it uses less digits than its factorization.

531004530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61731.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 531004530 is about 23043.5355360240. The cubic root of 531004530 is about 809.7781895317.

Adding to 531004530 its reverse (35400135), we get a palindrome (566404665).

It can be divided in two parts, 53100 and 4530, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 531004530 in words is "five hundred thirty-one million, four thousand, five hundred thirty".