502021251340 has 144 divisors (see below), whose sum is σ = 1258970815872. Its totient is φ = 167583596544.

The previous prime is 502021251311. The next prime is 502021251341. The reversal of 502021251340 is 43152120205.

It is not an unprimeable number, because it can be changed into a prime (502021251341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8861344 + ... + 8917816.

It is an arithmetic number, because the mean of its divisors is an integer number (8742852888).

Almost surely, 2^502021251340 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 502021251340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629485407936).

502021251340 is an abundant number, since it is smaller than the sum of its proper divisors (756949564532).

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

502021251340 is a wasteful number, since it uses less digits than its factorization.

502021251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56736 (or 56727 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 502021251340 its reverse (43152120205), we get a palindrome (545173371545).

The spelling of 502021251340 in words is "five hundred two billion, twenty-one million, two hundred fifty-one thousand, three hundred forty".