228338531 has 4 divisors (see below), whose sum is σ = 228719064. Its totient is φ = 227958000.

The previous prime is 228338527. The next prime is 228338533. The reversal of 228338531 is 135833822.

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

It is a cyclic number.

It is not a de Polignac number, because 228338531 - 2² = 228338527 is a prime.

It is a super-2 number, since 2×228338531² = 104276969478475922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228338491 and 228338500.

It is not an unprimeable number, because it can be changed into a prime (228338533) 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, 189365 + ... + 190566.

It is an arithmetic number, because the mean of its divisors is an integer number (57179766).

Almost surely, 2^228338531 is an apocalyptic number.

228338531 is a deficient number, since it is larger than the sum of its proper divisors (380533).

228338531 is an equidigital number, since it uses as much as digits as its factorization.

228338531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380532.

The product of its digits is 34560, while the sum is 35.

The square root of 228338531 is about 15110.8745941458. The cubic root of 228338531 is about 611.2136823227.

The spelling of 228338531 in words is "two hundred twenty-eight million, three hundred thirty-eight thousand, five hundred thirty-one".