133151331 has 4 divisors (see below), whose sum is σ = 177535112. Its totient is φ = 88767552.

The previous prime is 133151323. The next prime is 133151351.

133151331 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 133151331 - 2³ = 133151323 is a prime.

It is a super-2 number, since 2×133151331² = 35458553894143122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133151298 and 133151307.

It is not an unprimeable number, because it can be changed into a prime (133151351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22191886 + ... + 22191891.

It is an arithmetic number, because the mean of its divisors is an integer number (44383778).

Almost surely, 2^133151331 is an apocalyptic number.

133151331 is a deficient number, since it is larger than the sum of its proper divisors (44383781).

133151331 is an equidigital number, since it uses as much as digits as its factorization.

133151331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44383780.

The product of its digits is 405, while the sum is 21.

The square root of 133151331 is about 11539.1217603421. The cubic root of 133151331 is about 510.6403989080.

The spelling of 133151331 in words is "one hundred thirty-three million, one hundred fifty-one thousand, three hundred thirty-one".