52015640 has 16 divisors (see below), whose sum is σ = 117035280. Its totient is φ = 20806240.

The previous prime is 52015637. The next prime is 52015643. The reversal of 52015640 is 4651025.

It is an interprime number because it is at equal distance from previous prime (52015637) and next prime (52015643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52015643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650156 + ... + 650235.

It is an arithmetic number, because the mean of its divisors is an integer number (7314705).

Almost surely, 2^52015640 is an apocalyptic number.

It is an amenable number.

52015640 is an abundant number, since it is smaller than the sum of its proper divisors (65019640).

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

52015640 is a wasteful number, since it uses less digits than its factorization.

52015640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300402 (or 1300398 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 52015640 is about 7212.1869082824. The cubic root of 52015640 is about 373.2885327477.

Adding to 52015640 its reverse (4651025), we get a palindrome (56666665).

The spelling of 52015640 in words is "fifty-two million, fifteen thousand, six hundred forty".