55432520 has 96 divisors (see below), whose sum is σ = 147805560. Its totient is φ = 18585600.

The previous prime is 55432513. The next prime is 55432523. The reversal of 55432520 is 2523455.

55432520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24940036 + 30492484 = 4994^2 + 5522^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 55432520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55432523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62480 + ... + 63360.

Almost surely, 2^55432520 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 55432520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73902780).

55432520 is an abundant number, since it is smaller than the sum of its proper divisors (92373040).

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

55432520 is a wasteful number, since it uses less digits than its factorization.

55432520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 55432520 is about 7445.3018743366. The cubic root of 55432520 is about 381.2895248819.

Adding to 55432520 its reverse (2523455), we get a palindrome (57955975).

The spelling of 55432520 in words is "fifty-five million, four hundred thirty-two thousand, five hundred twenty".