225613226681 has 2 divisors, whose sum is σ = 225613226682. Its totient is φ = 225613226680.

The previous prime is 225613226639. The next prime is 225613226711. The reversal of 225613226681 is 186622316522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204525540025 + 21087686656 = 452245^2 + 145216^2 .

It is a cyclic number.

It is not a de Polignac number, because 225613226681 - 2⁶ = 225613226617 is a prime.

It is a super-2 number, since 2×225613226681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225613226281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112806613340 + 112806613341.

It is an arithmetic number, because the mean of its divisors is an integer number (112806613341).

Almost surely, 2^225613226681 is an apocalyptic number.

It is an amenable number.

225613226681 is a deficient number, since it is larger than the sum of its proper divisors (1).

225613226681 is an equidigital number, since it uses as much as digits as its factorization.

225613226681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The spelling of 225613226681 in words is "two hundred twenty-five billion, six hundred thirteen million, two hundred twenty-six thousand, six hundred eighty-one".