228146533 has 4 divisors (see below), whose sum is σ = 228176928. Its totient is φ = 228116140.

The previous prime is 228146531. The next prime is 228146537. The reversal of 228146533 is 335641822.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 228146533 - 2¹ = 228146531 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 (228146531) 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, 5088 + ... + 21958.

It is an arithmetic number, because the mean of its divisors is an integer number (57044232).

Almost surely, 2^228146533 is an apocalyptic number.

It is an amenable number.

228146533 is a deficient number, since it is larger than the sum of its proper divisors (30395).

228146533 is a wasteful number, since it uses less digits than its factorization.

228146533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30394.

The product of its digits is 34560, while the sum is 34.

The square root of 228146533 is about 15104.5202836767. The cubic root of 228146533 is about 611.0423216810.

The spelling of 228146533 in words is "two hundred twenty-eight million, one hundred forty-six thousand, five hundred thirty-three".