55940225 has 12 divisors (see below), whose sum is σ = 75672240. Its totient is φ = 40683600.

The previous prime is 55940221. The next prime is 55940239. The reversal of 55940225 is 52204955.

It is not a de Polignac number, because 55940225 - 2² = 55940221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55940191 and 55940200.

It is not an unprimeable number, because it can be changed into a prime (55940221) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 101435 + ... + 101984.

It is an arithmetic number, because the mean of its divisors is an integer number (6306020).

Almost surely, 2^55940225 is an apocalyptic number.

55940225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55940225 is a deficient number, since it is larger than the sum of its proper divisors (19732015).

55940225 is a wasteful number, since it uses less digits than its factorization.

55940225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203440 (or 203435 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 55940225 is about 7479.3198220159. The cubic root of 55940225 is about 382.4500625424.

It can be divided in two parts, 55940 and 225, that added together give a palindrome (56165).

The spelling of 55940225 in words is "fifty-five million, nine hundred forty thousand, two hundred twenty-five".