227513668021 has 2 divisors, whose sum is σ = 227513668022. Its totient is φ = 227513668020.

The previous prime is 227513667977. The next prime is 227513668069. The reversal of 227513668021 is 120866315722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193762834225 + 33750833796 = 440185^2 + 183714^2 .

It is a cyclic number.

It is not a de Polignac number, because 227513668021 - 2⁹ = 227513667509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227513668721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113756834010 + 113756834011.

It is an arithmetic number, because the mean of its divisors is an integer number (113756834011).

Almost surely, 2^227513668021 is an apocalyptic number.

It is an amenable number.

227513668021 is a deficient number, since it is larger than the sum of its proper divisors (1).

227513668021 is an equidigital number, since it uses as much as digits as its factorization.

227513668021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 227513668021 in words is "two hundred twenty-seven billion, five hundred thirteen million, six hundred sixty-eight thousand, twenty-one".