133255828 has 6 divisors (see below), whose sum is σ = 233197706. Its totient is φ = 66627912.

The previous prime is 133255819. The next prime is 133255847. The reversal of 133255828 is 828552331.

It can be written as a sum of positive squares in only one way, i.e., 118417924 + 14837904 = 10882^2 + 3852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16656975 + ... + 16656982.

Almost surely, 2^133255828 is an apocalyptic number.

It is an amenable number.

133255828 is a deficient number, since it is larger than the sum of its proper divisors (99941878).

133255828 is a wasteful number, since it uses less digits than its factorization.

133255828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313961 (or 33313959 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 133255828 is about 11543.6488165571. The cubic root of 133255828 is about 510.7739472959.

The spelling of 133255828 in words is "one hundred thirty-three million, two hundred fifty-five thousand, eight hundred twenty-eight".