133144131 has 4 divisors (see below), whose sum is σ = 177525512. Its totient is φ = 88762752.

The previous prime is 133144129. The next prime is 133144147. The reversal of 133144131 is 131441331.

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

It is not a de Polignac number, because 133144131 - 2¹ = 133144129 is a prime.

It is a super-2 number, since 2×133144131² = 35454719239490322, 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 = 133144098 and 133144107.

It is not an unprimeable number, because it can be changed into a prime (133144031) 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, 22190686 + ... + 22190691.

It is an arithmetic number, because the mean of its divisors is an integer number (44381378).

Almost surely, 2^133144131 is an apocalyptic number.

133144131 is a deficient number, since it is larger than the sum of its proper divisors (44381381).

133144131 is an equidigital number, since it uses as much as digits as its factorization.

133144131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44381380.

The product of its digits is 432, while the sum is 21.

The square root of 133144131 is about 11538.8097739758. The cubic root of 133144131 is about 510.6311946512.

Adding to 133144131 its reverse (131441331), we get a palindrome (264585462).

The spelling of 133144131 in words is "one hundred thirty-three million, one hundred forty-four thousand, one hundred thirty-one".