228016091 has 2 divisors, whose sum is σ = 228016092. Its totient is φ = 228016090.

The previous prime is 228016079. The next prime is 228016097. The reversal of 228016091 is 190610822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228016091 is a prime.

It is not a weakly prime, because it can be changed into another prime (228016097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114008045 + 114008046.

It is an arithmetic number, because the mean of its divisors is an integer number (114008046).

Almost surely, 2^228016091 is an apocalyptic number.

228016091 is a deficient number, since it is larger than the sum of its proper divisors (1).

228016091 is an equidigital number, since it uses as much as digits as its factorization.

228016091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 228016091 is about 15100.2016873948. The cubic root of 228016091 is about 610.9258456940.

The spelling of 228016091 in words is "two hundred twenty-eight million, sixteen thousand, ninety-one".