228521149 has 8 divisors (see below), whose sum is σ = 229959000. Its totient is φ = 227088192.

The previous prime is 228521129. The next prime is 228521159. The reversal of 228521149 is 941125822.

It can be written as a sum of positive squares in 4 ways, for example, as 22024249 + 206496900 = 4693^2 + 14370^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228521149 - 2⁹ = 228520637 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 (228521129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136087 + ... + 137755.

It is an arithmetic number, because the mean of its divisors is an integer number (28744875).

Almost surely, 2^228521149 is an apocalyptic number.

It is an amenable number.

228521149 is a deficient number, since it is larger than the sum of its proper divisors (1437851).

228521149 is a wasteful number, since it uses less digits than its factorization.

228521149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447.

The product of its digits is 11520, while the sum is 34.

The square root of 228521149 is about 15116.9159883886. The cubic root of 228521149 is about 611.3765820848.

The spelling of 228521149 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, one hundred forty-nine".