531542844 has 96 divisors (see below), whose sum is σ = 1583536640. Its totient is φ = 151041024.

The previous prime is 531542821. The next prime is 531542861. The reversal of 531542844 is 448245135.

It is a happy number.

531542844 is a `hidden beast` number, since 5 + 31 + 542 + 84 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 531542799 and 531542808.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 144087 + ... + 147729.

Almost surely, 2^531542844 is an apocalyptic number.

531542844 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531542844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791768320).

531542844 is an abundant number, since it is smaller than the sum of its proper divisors (1051993796).

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

531542844 is a wasteful number, since it uses less digits than its factorization.

531542844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3848 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 531542844 is about 23055.2129463165. The cubic root of 531542844 is about 810.0517388076.

Adding to 531542844 its reverse (448245135), we get a palindrome (979787979).

The spelling of 531542844 in words is "five hundred thirty-one million, five hundred forty-two thousand, eight hundred forty-four".