228127843147621 has 2 divisors, whose sum is σ = 228127843147622. Its totient is φ = 228127843147620.

The previous prime is 228127843147573. The next prime is 228127843147681. The reversal of 228127843147621 is 126741348721822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138057095052900 + 90070748094721 = 11749770^2 + 9490561^2 .

It is a cyclic number.

It is not a de Polignac number, because 228127843147621 - 2³³ = 228119253213029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228127843147681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114063921573810 + 114063921573811.

It is an arithmetic number, because the mean of its divisors is an integer number (114063921573811).

Almost surely, 2^{228127843147621} is an apocalyptic number.

It is an amenable number.

228127843147621 is a deficient number, since it is larger than the sum of its proper divisors (1).

228127843147621 is an equidigital number, since it uses as much as digits as its factorization.

228127843147621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14450688, while the sum is 58.

The spelling of 228127843147621 in words is "two hundred twenty-eight trillion, one hundred twenty-seven billion, eight hundred forty-three million, one hundred forty-seven thousand, six hundred twenty-one".