52543140 has 192 divisors, whose sum is σ = 170698752. Its totient is φ = 11980800.

The previous prime is 52543121. The next prime is 52543159. The reversal of 52543140 is 4134525.

52543140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52543121) and next prime (52543159).

It is a super-3 number, since 3×52543140³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 52543140.

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 63 ways as a sum of consecutive naturals, for example, 991354 + ... + 991406.

It is an arithmetic number, because the mean of its divisors is an integer number (889056).

Almost surely, 2^52543140 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 52543140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85349376).

52543140 is an abundant number, since it is smaller than the sum of its proper divisors (118155612).

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

52543140 is a wasteful number, since it uses less digits than its factorization.

52543140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 52543140 is about 7248.6647046197. The cubic root of 52543140 is about 374.5461531720.

Adding to 52543140 its reverse (4134525), we get a palindrome (56677665).

The spelling of 52543140 in words is "fifty-two million, five hundred forty-three thousand, one hundred forty".