133261151 has 4 divisors (see below), whose sum is σ = 133383072. Its totient is φ = 133139232.

The previous prime is 133261081. The next prime is 133261187. The reversal of 133261151 is 151162331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133261151 - 2¹⁴ = 133244767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133261651) 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, 59306 + ... + 61511.

It is an arithmetic number, because the mean of its divisors is an integer number (33345768).

Almost surely, 2^133261151 is an apocalyptic number.

133261151 is a deficient number, since it is larger than the sum of its proper divisors (121921).

133261151 is a wasteful number, since it uses less digits than its factorization.

133261151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121920.

The product of its digits is 540, while the sum is 23.

The square root of 133261151 is about 11543.8793739366. The cubic root of 133261151 is about 510.7807482830.

The spelling of 133261151 in words is "one hundred thirty-three million, two hundred sixty-one thousand, one hundred fifty-one".