52243540 has 24 divisors (see below), whose sum is σ = 115486560. Its totient is φ = 19797408.

The previous prime is 52243523. The next prime is 52243547. The reversal of 52243540 is 4534225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52243547) 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, 68362 + ... + 69121.

It is an arithmetic number, because the mean of its divisors is an integer number (4811940).

Almost surely, 2^52243540 is an apocalyptic number.

It is an amenable number.

52243540 is an abundant number, since it is smaller than the sum of its proper divisors (63243020).

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

52243540 is a wasteful number, since it uses less digits than its factorization.

52243540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137511 (or 137509 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 52243540 is about 7227.9692860443. The cubic root of 52243540 is about 373.8329107680.

Adding to 52243540 its reverse (4534225), we get a palindrome (56777765).

The spelling of 52243540 in words is "fifty-two million, two hundred forty-three thousand, five hundred forty".