225608572081 has 2 divisors, whose sum is σ = 225608572082. Its totient is φ = 225608572080.

The previous prime is 225608571997. The next prime is 225608572103. The reversal of 225608572081 is 180275806522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157800412081 + 67808160000 = 397241^2 + 260400^2 .

It is a cyclic number.

It is not a de Polignac number, because 225608572081 - 2¹⁹ = 225608047793 is a prime.

It is a super-2 number, since 2×225608572081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225608572681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112804286040 + 112804286041.

It is an arithmetic number, because the mean of its divisors is an integer number (112804286041).

Almost surely, 2^225608572081 is an apocalyptic number.

It is an amenable number.

225608572081 is a deficient number, since it is larger than the sum of its proper divisors (1).

225608572081 is an equidigital number, since it uses as much as digits as its factorization.

225608572081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 225608572081 in words is "two hundred twenty-five billion, six hundred eight million, five hundred seventy-two thousand, eighty-one".