133423131 has 8 divisors (see below), whose sum is σ = 180912960. Its totient is φ = 87441032.

The previous prime is 133423099. The next prime is 133423133. The reversal of 133423131 is 131324331.

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 133423131 - 2⁵ = 133423099 is a prime.

It is a super-2 number, since 2×133423131² = 35603463771686322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133423098 and 133423107.

It is not an unprimeable number, because it can be changed into a prime (133423133) 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, 376725 + ... + 377078.

It is an arithmetic number, because the mean of its divisors is an integer number (22614120).

Almost surely, 2^133423131 is an apocalyptic number.

133423131 is a deficient number, since it is larger than the sum of its proper divisors (47489829).

133423131 is an equidigital number, since it uses as much as digits as its factorization.

133423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753865.

The product of its digits is 648, while the sum is 21.

The square root of 133423131 is about 11550.8930823551. The cubic root of 133423131 is about 510.9876171902.

Adding to 133423131 its reverse (131324331), we get a palindrome (264747462).

The spelling of 133423131 in words is "one hundred thirty-three million, four hundred twenty-three thousand, one hundred thirty-one".