133755538 has 8 divisors (see below), whose sum is σ = 229295232. Its totient is φ = 57323796.

The previous prime is 133755533. The next prime is 133755539. The reversal of 133755538 is 835557331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133755538.

It is not an unprimeable number, because it can be changed into a prime (133755533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776970 + ... + 4776997.

It is an arithmetic number, because the mean of its divisors is an integer number (28661904).

Almost surely, 2^133755538 is an apocalyptic number.

133755538 is a deficient number, since it is larger than the sum of its proper divisors (95539694).

133755538 is an equidigital number, since it uses as much as digits as its factorization.

133755538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553976.

The product of its digits is 189000, while the sum is 40.

The square root of 133755538 is about 11565.2729323609. The cubic root of 133755538 is about 511.4116191263.

The spelling of 133755538 in words is "one hundred thirty-three million, seven hundred fifty-five thousand, five hundred thirty-eight".