133431230 has 8 divisors (see below), whose sum is σ = 240176232. Its totient is φ = 53372488.

The previous prime is 133431227. The next prime is 133431239. The reversal of 133431230 is 32134331.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6671552 + ... + 6671571.

It is an arithmetic number, because the mean of its divisors is an integer number (30022029).

Almost surely, 2^133431230 is an apocalyptic number.

133431230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133431230 is a deficient number, since it is larger than the sum of its proper divisors (106745002).

133431230 is a wasteful number, since it uses less digits than its factorization.

133431230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13343130.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 133431230 is about 11551.2436559879. The cubic root of 133431230 is about 510.9979562394.

Adding to 133431230 its reverse (32134331), we get a palindrome (165565561).

The spelling of 133431230 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred thirty".