228415749109 has 2 divisors, whose sum is σ = 228415749110. Its totient is φ = 228415749108.

The previous prime is 228415749073. The next prime is 228415749139. The reversal of 228415749109 is 901947514822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222427310884 + 5988438225 = 471622^2 + 77385^2 .

It is a cyclic number.

It is not a de Polignac number, because 228415749109 - 2²⁷ = 228281531381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228415749139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114207874554 + 114207874555.

It is an arithmetic number, because the mean of its divisors is an integer number (114207874555).

Almost surely, 2^228415749109 is an apocalyptic number.

It is an amenable number.

228415749109 is a deficient number, since it is larger than the sum of its proper divisors (1).

228415749109 is an equidigital number, since it uses as much as digits as its factorization.

228415749109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 228415749109 in words is "two hundred twenty-eight billion, four hundred fifteen million, seven hundred forty-nine thousand, one hundred nine".