228138061 has 8 divisors (see below), whose sum is σ = 231042240. Its totient is φ = 225241632.

The previous prime is 228138019. The next prime is 228138089. The reversal of 228138061 is 160831822.

228138061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228138061 - 2⁷ = 228137933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228138161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77136 + ... + 80038.

It is an arithmetic number, because the mean of its divisors is an integer number (28880280).

Almost surely, 2^228138061 is an apocalyptic number.

It is an amenable number.

228138061 is a deficient number, since it is larger than the sum of its proper divisors (2904179).

228138061 is an equidigital number, since it uses as much as digits as its factorization.

228138061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 228138061 is about 15104.2398352251. The cubic root of 228138061 is about 611.0347580996.

Adding to 228138061 its reverse (160831822), we get a palindrome (388969883).

The spelling of 228138061 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, sixty-one".