225361655 has 4 divisors (see below), whose sum is σ = 270433992. Its totient is φ = 180289320.

The previous prime is 225361637. The next prime is 225361691. The reversal of 225361655 is 556163522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556163522 = 2 ⋅278081761.

It is not a de Polignac number, because 225361655 - 2⁸ = 225361399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22536161 + ... + 22536170.

It is an arithmetic number, because the mean of its divisors is an integer number (67608498).

Almost surely, 2^225361655 is an apocalyptic number.

225361655 is a deficient number, since it is larger than the sum of its proper divisors (45072337).

225361655 is an equidigital number, since it uses as much as digits as its factorization.

225361655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45072336.

The product of its digits is 54000, while the sum is 35.

The square root of 225361655 is about 15012.0503263212. The cubic root of 225361655 is about 608.5459004861.

The spelling of 225361655 in words is "two hundred twenty-five million, three hundred sixty-one thousand, six hundred fifty-five".