227281385565 has 64 divisors (see below), whose sum is σ = 435489600000. Its totient is φ = 111801710592.

The previous prime is 227281385563. The next prime is 227281385581. The reversal of 227281385565 is 565583182722.

It is a happy number.

227281385565 is a `hidden beast` number, since 2 + 2 + 7 + 2 + 81 + 3 + 8 + 556 + 5 = 666.

It is not a de Polignac number, because 227281385565 - 2¹ = 227281385563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227281385563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2140152 + ... + 2243838.

It is an arithmetic number, because the mean of its divisors is an integer number (6804525000).

Almost surely, 2^227281385565 is an apocalyptic number.

It is an amenable number.

227281385565 is a deficient number, since it is larger than the sum of its proper divisors (208208214435).

227281385565 is a wasteful number, since it uses less digits than its factorization.

227281385565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104963 (or 104957 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 227281385565 in words is "two hundred twenty-seven billion, two hundred eighty-one million, three hundred eighty-five thousand, five hundred sixty-five".