55555225 has 24 divisors (see below), whose sum is σ = 75530880. Its totient is φ = 40200000.

The previous prime is 55555223. The next prime is 55555231. The reversal of 55555225 is 52255555.

It is not a de Polignac number, because 55555225 - 2¹ = 55555223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73600 + ... + 74350.

It is an arithmetic number, because the mean of its divisors is an integer number (3147120).

Almost surely, 2^55555225 is an apocalyptic number.

55555225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55555225 is a deficient number, since it is larger than the sum of its proper divisors (19975655).

55555225 is a wasteful number, since it uses less digits than its factorization.

55555225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1036 counting only the distinct ones).

The product of its digits is 62500, while the sum is 34.

The square root of 55555225 is about 7453.5377506255. The cubic root of 55555225 is about 381.5706573996.

The spelling of 55555225 in words is "fifty-five million, five hundred fifty-five thousand, two hundred twenty-five".