53232140 has 48 divisors (see below), whose sum is σ = 122689728. Its totient is φ = 19279104.

The previous prime is 53232121. The next prime is 53232149. The reversal of 53232140 is 4123235.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (53232149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11849 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (2556036).

Almost surely, 2^53232140 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 53232140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61344864).

53232140 is an abundant number, since it is smaller than the sum of its proper divisors (69457588).

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

53232140 is a wasteful number, since it uses less digits than its factorization.

53232140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 53232140 is about 7296.0359099993. The cubic root of 53232140 is about 376.1761943950.

Adding to 53232140 its reverse (4123235), we get a palindrome (57355375).

The spelling of 53232140 in words is "fifty-three million, two hundred thirty-two thousand, one hundred forty".