133255808 has 32 divisors (see below), whose sum is σ = 303396960. Its totient is φ = 57109248.

The previous prime is 133255799. The next prime is 133255819. The reversal of 133255808 is 808552331.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×133255808² = 35514220731465728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73466 + ... + 75257.

It is an arithmetic number, because the mean of its divisors is an integer number (9481155).

Almost surely, 2^133255808 is an apocalyptic number.

It is an amenable number.

133255808 is an abundant number, since it is smaller than the sum of its proper divisors (170141152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133255808 is an equidigital number, since it uses as much as digits as its factorization.

133255808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148744 (or 148732 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 133255808 is about 11543.6479502798. The cubic root of 133255808 is about 510.7739217423.

The spelling of 133255808 in words is "one hundred thirty-three million, two hundred fifty-five thousand, eight hundred eight".