227781341346221 has 8 divisors (see below), whose sum is σ = 245326504371480. Its totient is φ = 210239538518592.

The previous prime is 227781341346161. The next prime is 227781341346241. The reversal of 227781341346221 is 122643143187722.

It can be written as a sum of positive squares in 4 ways, for example, as 65723222004196 + 162058119342025 = 8106986^2 + 12730205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 227781341346221 - 2²² = 227781337151917 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 (227781341346241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839908610 + ... + 840179763.

It is an arithmetic number, because the mean of its divisors is an integer number (30665813046435).

Almost surely, 2^{227781341346221} is an apocalyptic number.

It is an amenable number.

227781341346221 is a deficient number, since it is larger than the sum of its proper divisors (17545163025259).

227781341346221 is a wasteful number, since it uses less digits than its factorization.

227781341346221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680098815.

The product of its digits is 5419008, while the sum is 53.

The spelling of 227781341346221 in words is "two hundred twenty-seven trillion, seven hundred eighty-one billion, three hundred forty-one million, three hundred forty-six thousand, two hundred twenty-one".