52125440 has 72 divisors (see below), whose sum is σ = 126098448. Its totient is φ = 20643840.

The previous prime is 52125439. The next prime is 52125449. The reversal of 52125440 is 4452125.

It is a happy number.

It is a super-2 number, since 2×52125440² = 5434122990387200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52125449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246935 + ... + 247145.

Almost surely, 2^52125440 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 52125440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63049224).

52125440 is an abundant number, since it is smaller than the sum of its proper divisors (73973008).

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

52125440 is a wasteful number, since it uses less digits than its factorization.

52125440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 52125440 is about 7219.7950109404. The cubic root of 52125440 is about 373.5510068468.

Adding to 52125440 its reverse (4452125), we get a palindrome (56577565).

The spelling of 52125440 in words is "fifty-two million, one hundred twenty-five thousand, four hundred forty".