228048581 has 2 divisors, whose sum is σ = 228048582. Its totient is φ = 228048580.

The previous prime is 228048553. The next prime is 228048671. The reversal of 228048581 is 185840822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212168356 + 15880225 = 14566^2 + 3985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228048581 is a prime.

It is a super-2 number, since 2×228048581² = 104012310592227122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228048551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114024290 + 114024291.

It is an arithmetic number, because the mean of its divisors is an integer number (114024291).

Almost surely, 2^228048581 is an apocalyptic number.

It is an amenable number.

228048581 is a deficient number, since it is larger than the sum of its proper divisors (1).

228048581 is an equidigital number, since it uses as much as digits as its factorization.

228048581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 228048581 is about 15101.2774625195. The cubic root of 228048581 is about 610.9548612457.

The spelling of 228048581 in words is "two hundred twenty-eight million, forty-eight thousand, five hundred eighty-one".