55225240 has 32 divisors (see below), whose sum is σ = 142008480. Its totient is φ = 18934272.

The previous prime is 55225223. The next prime is 55225243. The reversal of 55225240 is 4252255.

It is a happy number.

55225240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55225243) 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 7 ways as a sum of consecutive naturals, for example, 98337 + ... + 98896.

It is an arithmetic number, because the mean of its divisors is an integer number (4437765).

Almost surely, 2^55225240 is an apocalyptic number.

It is an amenable number.

55225240 is an abundant number, since it is smaller than the sum of its proper divisors (86783240).

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

55225240 is a wasteful number, since it uses less digits than its factorization.

55225240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197251 (or 197247 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55225240 is about 7431.3686491790. The cubic root of 55225240 is about 380.8136765973.

Adding to 55225240 its reverse (4252255), we get a palindrome (59477495).

The spelling of 55225240 in words is "fifty-five million, two hundred twenty-five thousand, two hundred forty".