225355551 has 4 divisors (see below), whose sum is σ = 300474072. Its totient is φ = 150237032.

The previous prime is 225355517. The next prime is 225355577. The reversal of 225355551 is 155553522.

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 225355551 - 2¹⁰ = 225354527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225355591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37559256 + ... + 37559261.

It is an arithmetic number, because the mean of its divisors is an integer number (75118518).

Almost surely, 2^225355551 is an apocalyptic number.

225355551 is a deficient number, since it is larger than the sum of its proper divisors (75118521).

225355551 is an equidigital number, since it uses as much as digits as its factorization.

225355551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75118520.

The product of its digits is 37500, while the sum is 33.

The square root of 225355551 is about 15011.8470216026. The cubic root of 225355551 is about 608.5404062097.

The spelling of 225355551 in words is "two hundred twenty-five million, three hundred fifty-five thousand, five hundred fifty-one".