133435131 has 4 divisors (see below), whose sum is σ = 177913512. Its totient is φ = 88956752.

The previous prime is 133435117. The next prime is 133435153. The reversal of 133435131 is 131534331.

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

It is a cyclic number.

It is not a de Polignac number, because 133435131 - 2⁹ = 133434619 is a prime.

It is a super-2 number, since 2×133435131² = 35609868369974322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133435111) 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, 22239186 + ... + 22239191.

It is an arithmetic number, because the mean of its divisors is an integer number (44478378).

Almost surely, 2^133435131 is an apocalyptic number.

133435131 is a deficient number, since it is larger than the sum of its proper divisors (44478381).

133435131 is an equidigital number, since it uses as much as digits as its factorization.

133435131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44478380.

The product of its digits is 1620, while the sum is 24.

The square root of 133435131 is about 11551.4125110308. The cubic root of 133435131 is about 511.0029360421.

Adding to 133435131 its reverse (131534331), we get a palindrome (264969462).

The spelling of 133435131 in words is "one hundred thirty-three million, four hundred thirty-five thousand, one hundred thirty-one".