133220331 has 6 divisors (see below), whose sum is σ = 192429380. Its totient is φ = 88813548.

The previous prime is 133220327. The next prime is 133220359. The reversal of 133220331 is 133022331.

133220331 is a `hidden beast` number, since 1 + 332 + 2 + 0 + 331 = 666.

It is not a de Polignac number, because 133220331 - 2² = 133220327 is a prime.

It is a super-2 number, since 2×133220331² = 35495313183499122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133225331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7401121 + ... + 7401138.

Almost surely, 2^133220331 is an apocalyptic number.

133220331 is a deficient number, since it is larger than the sum of its proper divisors (59209049).

133220331 is a wasteful number, since it uses less digits than its factorization.

133220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14802265 (or 14802262 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133220331 is about 11542.1112020289. Note that the first 3 decimals coincide. The cubic root of 133220331 is about 510.7285895474.

Adding to 133220331 its reverse (133022331), we get a palindrome (266242662).

The spelling of 133220331 in words is "one hundred thirty-three million, two hundred twenty thousand, three hundred thirty-one".