531820434 has 16 divisors (see below), whose sum is σ = 1066543488. Its totient is φ = 176789712.

The previous prime is 531820433. The next prime is 531820441. The reversal of 531820434 is 434028135.

It is not an unprimeable number, because it can be changed into a prime (531820433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118557 + ... + 122960.

It is an arithmetic number, because the mean of its divisors is an integer number (66658968).

Almost surely, 2^531820434 is an apocalyptic number.

531820434 is an abundant number, since it is smaller than the sum of its proper divisors (534723054).

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

531820434 is a wasteful number, since it uses less digits than its factorization.

531820434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241889.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 531820434 is about 23061.2322741002. The cubic root of 531820434 is about 810.1927265834.

Adding to 531820434 its reverse (434028135), we get a palindrome (965848569).

It can be divided in two parts, 5318 and 20434, that added together give a palindrome (25752).

The spelling of 531820434 in words is "five hundred thirty-one million, eight hundred twenty thousand, four hundred thirty-four".