133750081 has 8 divisors (see below), whose sum is σ = 138596480. Its totient is φ = 128982672.

The previous prime is 133750061. The next prime is 133750091. The reversal of 133750081 is 180057331.

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 133750081 - 2⁵ = 133750049 is a prime.

It is a super-2 number, since 2×133750081² = 35778168335013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133750021) 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, 16290 + ... + 23083.

It is an arithmetic number, because the mean of its divisors is an integer number (17324560).

Almost surely, 2^133750081 is an apocalyptic number.

It is an amenable number.

133750081 is a deficient number, since it is larger than the sum of its proper divisors (4846399).

133750081 is an equidigital number, since it uses as much as digits as its factorization.

133750081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39495.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 133750081 is about 11565.0370081552. The cubic root of 133750081 is about 511.4046641216.

The spelling of 133750081 in words is "one hundred thirty-three million, seven hundred fifty thousand, eighty-one".