133151321 has 4 divisors (see below), whose sum is σ = 133240272. Its totient is φ = 133062372.

The previous prime is 133151299. The next prime is 133151323. The reversal of 133151321 is 123151331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133151321 - 2¹⁸ = 132889177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133151293 and 133151302.

It is not an unprimeable number, because it can be changed into a prime (133151323) 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, 42191 + ... + 45236.

It is an arithmetic number, because the mean of its divisors is an integer number (33310068).

Almost surely, 2^133151321 is an apocalyptic number.

It is an amenable number.

133151321 is a deficient number, since it is larger than the sum of its proper divisors (88951).

133151321 is an equidigital number, since it uses as much as digits as its factorization.

133151321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88950.

The product of its digits is 270, while the sum is 20.

The square root of 133151321 is about 11539.1213270335. The cubic root of 133151321 is about 510.6403861245.

The spelling of 133151321 in words is "one hundred thirty-three million, one hundred fifty-one thousand, three hundred twenty-one".