52525440 has 192 divisors, whose sum is σ = 198104400. Its totient is φ = 12718080.

The previous prime is 52525433. The next prime is 52525477. The reversal of 52525440 is 4452525.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62946 + ... + 63774.

Almost surely, 2^52525440 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 52525440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99052200).

52525440 is an abundant number, since it is smaller than the sum of its proper divisors (145578960).

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

52525440 is a wasteful number, since it uses less digits than its factorization.

52525440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 52525440 is about 7247.4436872597. The cubic root of 52525440 is about 374.5040911542.

Adding to 52525440 its reverse (4452525), we get a palindrome (56977965).

The spelling of 52525440 in words is "fifty-two million, five hundred twenty-five thousand, four hundred forty".