52213887540 has 72 divisors (see below), whose sum is σ = 158417787528. Its totient is φ = 13920568320.

The previous prime is 52213887521. The next prime is 52213887559. The reversal of 52213887540 is 4578831225.

52213887540 is a `hidden beast` number, since 5 + 2 + 21 + 3 + 8 + 87 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (52213887521) and next prime (52213887559).

It can be written as a sum of positive squares in 4 ways, for example, as 5563071396 + 46650816144 = 74586^2 + 215988^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 832480 + ... + 893000.

It is an arithmetic number, because the mean of its divisors is an integer number (2200247049).

Almost surely, 2^52213887540 is an apocalyptic number.

It is an amenable number.

52213887540 is an abundant number, since it is smaller than the sum of its proper divisors (106203899988).

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

52213887540 is a wasteful number, since it uses less digits than its factorization.

52213887540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65329 (or 65324 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 52213887540 in words is "fifty-two billion, two hundred thirteen million, eight hundred eighty-seven thousand, five hundred forty".