55131225 has 12 divisors (see below), whose sum is σ = 91150416. Its totient is φ = 29403280.

The previous prime is 55131199. The next prime is 55131227. The reversal of 55131225 is 52213155.

It is a happy number.

55131225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55131225 - 2¹² = 55127129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55131195 and 55131204.

It is not an unprimeable number, because it can be changed into a prime (55131227) 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 11 ways as a sum of consecutive naturals, for example, 367467 + ... + 367616.

It is an arithmetic number, because the mean of its divisors is an integer number (7595868).

Almost surely, 2^55131225 is an apocalyptic number.

It is an amenable number.

55131225 is a deficient number, since it is larger than the sum of its proper divisors (36019191).

55131225 is a wasteful number, since it uses less digits than its factorization.

55131225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735096 (or 735091 counting only the distinct ones).

The product of its digits is 1500, while the sum is 24.

The square root of 55131225 is about 7425.0404039305. The cubic root of 55131225 is about 380.5974558167.

The spelling of 55131225 in words is "fifty-five million, one hundred thirty-one thousand, two hundred twenty-five".