531222533240 has 128 divisors (see below), whose sum is σ = 1427606415360. Its totient is φ = 173943965184.

The previous prime is 531222533239. The next prime is 531222533291. The reversal of 531222533240 is 42335222135.

It is a junction number, because it is equal to n+sod(n) for n = 531222533197 and 531222533206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4102934 + ... + 4230426.

It is an arithmetic number, because the mean of its divisors is an integer number (11153175120).

Almost surely, 2^531222533240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531222533240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713803207680).

531222533240 is an abundant number, since it is smaller than the sum of its proper divisors (896383882120).

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

531222533240 is a wasteful number, since it uses less digits than its factorization.

531222533240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128181 (or 128177 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 531222533240 its reverse (42335222135), we get a palindrome (573557755375).

The spelling of 531222533240 in words is "five hundred thirty-one billion, two hundred twenty-two million, five hundred thirty-three thousand, two hundred forty".