227251720681 has 2 divisors, whose sum is σ = 227251720682. Its totient is φ = 227251720680.

The previous prime is 227251720667. The next prime is 227251720721. The reversal of 227251720681 is 186027152722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227251470681 + 250000 = 476709^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 227251720681 - 2⁵ = 227251720649 is a prime.

It is a super-2 number, since 2×227251720681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (227251720601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113625860340 + 113625860341.

It is an arithmetic number, because the mean of its divisors is an integer number (113625860341).

Almost surely, 2^227251720681 is an apocalyptic number.

It is an amenable number.

227251720681 is a deficient number, since it is larger than the sum of its proper divisors (1).

227251720681 is an equidigital number, since it uses as much as digits as its factorization.

227251720681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 227251720681 in words is "two hundred twenty-seven billion, two hundred fifty-one million, seven hundred twenty thousand, six hundred eighty-one".