225176856578881 has 4 divisors (see below), whose sum is σ = 226611104073172. Its totient is φ = 223742609084592.

The previous prime is 225176856578833. The next prime is 225176856578917. The reversal of 225176856578881 is 188875658671522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20224448065600 + 204952408513281 = 4497160^2 + 14316159^2 .

It is a cyclic number.

It is not a de Polignac number, because 225176856578881 - 2¹⁹ = 225176856054593 is a prime.

It is a super-2 number, since 2×225176856578881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225176856570881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717123746910 + ... + 717123747223.

It is an arithmetic number, because the mean of its divisors is an integer number (56652776018293).

Almost surely, 2^{225176856578881} is an apocalyptic number.

It is an amenable number.

225176856578881 is a deficient number, since it is larger than the sum of its proper divisors (1434247494291).

225176856578881 is a wasteful number, since it uses less digits than its factorization.

225176856578881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434247494290.

The product of its digits is 3612672000, while the sum is 79.

The spelling of 225176856578881 in words is "two hundred twenty-five trillion, one hundred seventy-six billion, eight hundred fifty-six million, five hundred seventy-eight thousand, eight hundred eighty-one".