133123331 has 8 divisors (see below), whose sum is σ = 149910528. Its totient is φ = 117117000.

The previous prime is 133123321. The next prime is 133123337. The reversal of 133123331 is 133321331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133123331 - 2⁶ = 133123267 is a prime.

It is a super-2 number, since 2×133123331² = 35443642513071122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133123337) 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, 194855 + ... + 195536.

It is an arithmetic number, because the mean of its divisors is an integer number (18738816).

Almost surely, 2^133123331 is an apocalyptic number.

133123331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133123331 is a deficient number, since it is larger than the sum of its proper divisors (16787197).

133123331 is a wasteful number, since it uses less digits than its factorization.

133123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390433.

The product of its digits is 486, while the sum is 20.

The square root of 133123331 is about 11537.9084326406. The cubic root of 133123331 is about 510.6046027118.

Adding to 133123331 its reverse (133321331), we get a palindrome (266444662).

The spelling of 133123331 in words is "one hundred thirty-three million, one hundred twenty-three thousand, three hundred thirty-one".