53421432 has 64 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 16926720.

The previous prime is 53421419. The next prime is 53421461. The reversal of 53421432 is 23412435.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43288 + ... + 44504.

It is an arithmetic number, because the mean of its divisors is an integer number (2192400).

Almost surely, 2^53421432 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 53421432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70156800).

53421432 is an abundant number, since it is smaller than the sum of its proper divisors (86892168).

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

53421432 is a wasteful number, since it uses less digits than its factorization.

53421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1312 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 53421432 is about 7308.9966479675. The cubic root of 53421432 is about 376.6215575848.

Adding to 53421432 its reverse (23412435), we get a palindrome (76833867).

The spelling of 53421432 in words is "fifty-three million, four hundred twenty-one thousand, four hundred thirty-two".