133132251 has 8 divisors (see below), whose sum is σ = 202868224. Its totient is φ = 76075560.

The previous prime is 133132231. The next prime is 133132267. The reversal of 133132251 is 152231331.

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

It is not a de Polignac number, because 133132251 - 2¹⁰ = 133131227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6339631 = 133132251 / (1 + 3 + 3 + 1 + 3 + 2 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133132201) 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, 3169795 + ... + 3169836.

It is an arithmetic number, because the mean of its divisors is an integer number (25358528).

Almost surely, 2^133132251 is an apocalyptic number.

133132251 is a deficient number, since it is larger than the sum of its proper divisors (69735973).

133132251 is an equidigital number, since it uses as much as digits as its factorization.

133132251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6339641.

The product of its digits is 540, while the sum is 21.

The square root of 133132251 is about 11538.2949780286. The cubic root of 133132251 is about 510.6160069019.

Adding to 133132251 its reverse (152231331), we get a palindrome (285363582).

The spelling of 133132251 in words is "one hundred thirty-three million, one hundred thirty-two thousand, two hundred fifty-one".