225455551 has 4 divisors (see below), whose sum is σ = 225547504. Its totient is φ = 225363600.

The previous prime is 225455537. The next prime is 225455617. The reversal of 225455551 is 155554522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225455551 - 2²⁵ = 191901119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225455521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42195 + ... + 47236.

It is an arithmetic number, because the mean of its divisors is an integer number (56386876).

Almost surely, 2^225455551 is an apocalyptic number.

225455551 is a deficient number, since it is larger than the sum of its proper divisors (91953).

225455551 is an equidigital number, since it uses as much as digits as its factorization.

225455551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91952.

The product of its digits is 50000, while the sum is 34.

The square root of 225455551 is about 15015.1773549299. The cubic root of 225455551 is about 608.6304047940.

The spelling of 225455551 in words is "two hundred twenty-five million, four hundred fifty-five thousand, five hundred fifty-one".