228247081 has 4 divisors (see below), whose sum is σ = 236117700. Its totient is φ = 220376464.

The previous prime is 228247021. The next prime is 228247121. The reversal of 228247081 is 180742822.

228247081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182007081 + 46240000 = 13491^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 228247081 - 2⁹ = 228246569 is a prime.

It is a super-2 number, since 2×228247081² = 104193459970041122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228247001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3935266 + ... + 3935323.

It is an arithmetic number, because the mean of its divisors is an integer number (59029425).

Almost surely, 2^228247081 is an apocalyptic number.

It is an amenable number.

228247081 is a deficient number, since it is larger than the sum of its proper divisors (7870619).

228247081 is an equidigital number, since it uses as much as digits as its factorization.

228247081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7870618.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 228247081 is about 15107.8483246292. The cubic root of 228247081 is about 611.1320740272.

The spelling of 228247081 in words is "two hundred twenty-eight million, two hundred forty-seven thousand, eighty-one".