55280232 has 120 divisors (see below), whose sum is σ = 180218610. Its totient is φ = 15785280.

The previous prime is 55280221. The next prime is 55280261. The reversal of 55280232 is 23208255.

55280232 is a `hidden beast` number, since 552 + 80 + 2 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55264356 + 15876 = 7434^2 + 126^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55280196 and 55280205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30882 + ... + 32622.

Almost surely, 2^55280232 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 55280232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90109305).

55280232 is an abundant number, since it is smaller than the sum of its proper divisors (124938378).

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

55280232 is a wasteful number, since it uses less digits than its factorization.

55280232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1753 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55280232 is about 7435.0677199337. The cubic root of 55280232 is about 380.9400364432.

Adding to 55280232 its reverse (23208255), we get a palindrome (78488487).

The spelling of 55280232 in words is "fifty-five million, two hundred eighty thousand, two hundred thirty-two".