52431540 has 96 divisors (see below), whose sum is σ = 173236224. Its totient is φ = 11594880.

The previous prime is 52431539. The next prime is 52431541. The reversal of 52431540 is 4513425.

It is an interprime number because it is at equal distance from previous prime (52431539) and next prime (52431541).

It is a self number, because there is not a number n which added to its sum of digits gives 52431540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52431541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11007 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (1804544).

Almost surely, 2^52431540 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 52431540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86618112).

52431540 is an abundant number, since it is smaller than the sum of its proper divisors (120804684).

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

52431540 is a wasteful number, since it uses less digits than its factorization.

52431540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077 (or 4075 counting only the distinct ones).

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

The square root of 52431540 is about 7240.9626431850. The cubic root of 52431540 is about 374.2807904042.

Adding to 52431540 its reverse (4513425), we get a palindrome (56944965).

The spelling of 52431540 in words is "fifty-two million, four hundred thirty-one thousand, five hundred forty".