133273228 has 24 divisors (see below), whose sum is σ = 257297040. Its totient is φ = 59896320.

The previous prime is 133273213. The next prime is 133273229. The reversal of 133273228 is 822372331.

It is a self number, because there is not a number n which added to its sum of digits gives 133273228.

It is not an unprimeable number, because it can be changed into a prime (133273229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13101 + ... + 20932.

It is an arithmetic number, because the mean of its divisors is an integer number (10720710).

Almost surely, 2^133273228 is an apocalyptic number.

It is an amenable number.

133273228 is a deficient number, since it is larger than the sum of its proper divisors (124023812).

133273228 is a wasteful number, since it uses less digits than its factorization.

133273228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34137 (or 34135 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 133273228 is about 11544.4024531372. The cubic root of 133273228 is about 510.7961779180.

The spelling of 133273228 in words is "one hundred thirty-three million, two hundred seventy-three thousand, two hundred twenty-eight".