531245334402 has 128 divisors (see below), whose sum is σ = 1247420160000. Its totient is φ = 167123238336.

The previous prime is 531245334391. The next prime is 531245334409. The reversal of 531245334402 is 204433542135.

531245334402 is a `hidden beast` number, since 5 + 3 + 1 + 245 + 3 + 3 + 4 + 402 = 666.

It is not an unprimeable number, because it can be changed into a prime (531245334409) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 532843368 + ... + 532844364.

It is an arithmetic number, because the mean of its divisors is an integer number (9745470000).

Almost surely, 2^531245334402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531245334402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623710080000).

531245334402 is an abundant number, since it is smaller than the sum of its proper divisors (716174825598).

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

531245334402 is a wasteful number, since it uses less digits than its factorization.

531245334402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2479 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 531245334402 its reverse (204433542135), we get a palindrome (735678876537).

The spelling of 531245334402 in words is "five hundred thirty-one billion, two hundred forty-five million, three hundred thirty-four thousand, four hundred two".