133727331 has 4 divisors (see below), whose sum is σ = 178303112. Its totient is φ = 89151552.

The previous prime is 133727327. The next prime is 133727383.

133727331 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133727331 - 2² = 133727327 is a prime.

It is a super-2 number, since 2×133727331² = 35765998112767122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133722331) 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, 22287886 + ... + 22287891.

It is an arithmetic number, because the mean of its divisors is an integer number (44575778).

Almost surely, 2^133727331 is an apocalyptic number.

133727331 is a deficient number, since it is larger than the sum of its proper divisors (44575781).

133727331 is an equidigital number, since it uses as much as digits as its factorization.

133727331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44575780.

The product of its digits is 7938, while the sum is 30.

The square root of 133727331 is about 11564.0533983547. The cubic root of 133727331 is about 511.3756669658.

The spelling of 133727331 in words is "one hundred thirty-three million, seven hundred twenty-seven thousand, three hundred thirty-one".