133144331 has 4 divisors (see below), whose sum is σ = 133834392. Its totient is φ = 132454272.

The previous prime is 133144327. The next prime is 133144351. The reversal of 133144331 is 133441331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133441331 = 23 ⋅5801797.

It is a cyclic number.

It is not a de Polignac number, because 133144331 - 2² = 133144327 is a prime.

It is a super-2 number, since 2×133144331² = 35454825754875122, 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 = 133144297 and 133144306.

It is not an unprimeable number, because it can be changed into a prime (133144351) 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, 344741 + ... + 345126.

It is an arithmetic number, because the mean of its divisors is an integer number (33458598).

Almost surely, 2^133144331 is an apocalyptic number.

133144331 is a deficient number, since it is larger than the sum of its proper divisors (690061).

133144331 is an equidigital number, since it uses as much as digits as its factorization.

133144331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690060.

The product of its digits is 1296, while the sum is 23.

The square root of 133144331 is about 11538.8184403777. The cubic root of 133144331 is about 510.6314503294.

Adding to 133144331 its reverse (133441331), we get a palindrome (266585662).

The spelling of 133144331 in words is "one hundred thirty-three million, one hundred forty-four thousand, three hundred thirty-one".