228670133 has 4 divisors (see below), whose sum is σ = 236555340. Its totient is φ = 220784928.

The previous prime is 228670121. The next prime is 228670159. The reversal of 228670133 is 331076822.

It is a happy number.

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 136375684 + 92294449 = 11678^2 + 9607^2 .

It is a cyclic number.

It is not a de Polignac number, because 228670133 - 2⁶ = 228670069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228670133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228670193) 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, 3942560 + ... + 3942617.

It is an arithmetic number, because the mean of its divisors is an integer number (59138835).

Almost surely, 2^228670133 is an apocalyptic number.

It is an amenable number.

228670133 is a deficient number, since it is larger than the sum of its proper divisors (7885207).

228670133 is an equidigital number, since it uses as much as digits as its factorization.

228670133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885206.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 228670133 is about 15121.8429101747. The cubic root of 228670133 is about 611.5094152193.

The spelling of 228670133 in words is "two hundred twenty-eight million, six hundred seventy thousand, one hundred thirty-three".