228333057 has 4 divisors (see below), whose sum is σ = 304444080. Its totient is φ = 152222036.

The previous prime is 228333041. The next prime is 228333067. The reversal of 228333057 is 750333822.

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 228333057 - 2⁴ = 228333041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228333067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38055507 + ... + 38055512.

It is an arithmetic number, because the mean of its divisors is an integer number (76111020).

Almost surely, 2^228333057 is an apocalyptic number.

It is an amenable number.

228333057 is a deficient number, since it is larger than the sum of its proper divisors (76111023).

228333057 is an equidigital number, since it uses as much as digits as its factorization.

228333057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76111022.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 228333057 is about 15110.6934652252. The cubic root of 228333057 is about 611.2087980391.

Adding to 228333057 its reverse (750333822), we get a palindrome (978666879).

The spelling of 228333057 in words is "two hundred twenty-eight million, three hundred thirty-three thousand, fifty-seven".