228237081 has 4 divisors (see below), whose sum is σ = 304316112. Its totient is φ = 152158052.

The previous prime is 228237067. The next prime is 228237089. The reversal of 228237081 is 180732822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228237081 - 2⁵ = 228237049 is a prime.

It is a super-2 number, since 2×228237081² = 104184330286801122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228237089) 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, 38039511 + ... + 38039516.

It is an arithmetic number, because the mean of its divisors is an integer number (76079028).

Almost surely, 2^228237081 is an apocalyptic number.

It is an amenable number.

228237081 is a deficient number, since it is larger than the sum of its proper divisors (76079031).

228237081 is an equidigital number, since it uses as much as digits as its factorization.

228237081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76079030.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 228237081 is about 15107.5173671917. The cubic root of 228237081 is about 611.1231488893.

The spelling of 228237081 in words is "two hundred twenty-eight million, two hundred thirty-seven thousand, eighty-one".