133550331 has 4 divisors (see below), whose sum is σ = 178067112. Its totient is φ = 89033552.

The previous prime is 133550327. The next prime is 133550341. The reversal of 133550331 is 133055331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133055331 = 3 ⋅44351777.

It is a cyclic number.

It is not a de Polignac number, because 133550331 - 2² = 133550327 is a prime.

It is a super-2 number, since 2×133550331² = 35671381820419122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133550311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22258386 + ... + 22258391.

It is an arithmetic number, because the mean of its divisors is an integer number (44516778).

Almost surely, 2^133550331 is an apocalyptic number.

133550331 is a deficient number, since it is larger than the sum of its proper divisors (44516781).

133550331 is an equidigital number, since it uses as much as digits as its factorization.

133550331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44516780.

The product of its (nonzero) digits is 2025, while the sum is 24.

The square root of 133550331 is about 11556.3978384270. The cubic root of 133550331 is about 511.1499503129.

The spelling of 133550331 in words is "one hundred thirty-three million, five hundred fifty thousand, three hundred thirty-one".