133431351 has 16 divisors (see below), whose sum is σ = 188757504. Its totient is φ = 83551104.

The previous prime is 133431307. The next prime is 133431367. The reversal of 133431351 is 153134331.

It is not a de Polignac number, because 133431351 - 2¹³ = 133423159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133430351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25506 + ... + 30288.

It is an arithmetic number, because the mean of its divisors is an integer number (11797344).

Almost surely, 2^133431351 is an apocalyptic number.

133431351 is a deficient number, since it is larger than the sum of its proper divisors (55326153).

133431351 is a wasteful number, since it uses less digits than its factorization.

133431351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350.

The product of its digits is 1620, while the sum is 24.

The square root of 133431351 is about 11551.2488935180. The cubic root of 133431351 is about 510.9981107029.

Adding to 133431351 its reverse (153134331), we get a palindrome (286565682).

The spelling of 133431351 in words is "one hundred thirty-three million, four hundred thirty-one thousand, three hundred fifty-one".