52015121340 has 384 divisors, whose sum is σ = 195929653248. Its totient is φ = 9995304960.

The previous prime is 52015121321. The next prime is 52015121359. The reversal of 52015121340 is 4312151025.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52015121321) and next prime (52015121359).

It is a self number, because there is not a number n which added to its sum of digits gives 52015121340.

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 127 ways as a sum of consecutive naturals, for example, 2868382 + ... + 2886458.

It is an arithmetic number, because the mean of its divisors is an integer number (510233472).

Almost surely, 2^52015121340 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 52015121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97964826624).

52015121340 is an abundant number, since it is smaller than the sum of its proper divisors (143914531908).

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

52015121340 is a wasteful number, since it uses less digits than its factorization.

52015121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18157 (or 18155 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 52015121340 its reverse (4312151025), we get a palindrome (56327272365).

The spelling of 52015121340 in words is "fifty-two billion, fifteen million, one hundred twenty-one thousand, three hundred forty".