228701673521 has 2 divisors, whose sum is σ = 228701673522. Its totient is φ = 228701673520.

The previous prime is 228701673481. The next prime is 228701673539. The reversal of 228701673521 is 125376107822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128855153296 + 99846520225 = 358964^2 + 315985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228701673521 is a prime.

It is not a weakly prime, because it can be changed into another prime (228701073521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114350836760 + 114350836761.

It is an arithmetic number, because the mean of its divisors is an integer number (114350836761).

Almost surely, 2^228701673521 is an apocalyptic number.

It is an amenable number.

228701673521 is a deficient number, since it is larger than the sum of its proper divisors (1).

228701673521 is an equidigital number, since it uses as much as digits as its factorization.

228701673521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 228701673521 in words is "two hundred twenty-eight billion, seven hundred one million, six hundred seventy-three thousand, five hundred twenty-one".