133232331 has 4 divisors (see below), whose sum is σ = 177643112. Its totient is φ = 88821552.

The previous prime is 133232321. The next prime is 133232387.

133232331 is nontrivially palindromic in base 10.

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

It is a de Polignac number, because none of the positive numbers 2^k-133232331 is a prime.

It is a super-2 number, since 2×133232331² = 35501708047387122, 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 = 133232298 and 133232307.

It is not an unprimeable number, because it can be changed into a prime (133232321) 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, 22205386 + ... + 22205391.

It is an arithmetic number, because the mean of its divisors is an integer number (44410778).

Almost surely, 2^133232331 is an apocalyptic number.

133232331 is a deficient number, since it is larger than the sum of its proper divisors (44410781).

133232331 is an equidigital number, since it uses as much as digits as its factorization.

133232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44410780.

The product of its digits is 972, while the sum is 21.

The square root of 133232331 is about 11542.6310258970. The cubic root of 133232331 is about 510.7439239413.

The spelling of 133232331 in words is "one hundred thirty-three million, two hundred thirty-two thousand, three hundred thirty-one".