133431955 has 8 divisors (see below), whose sum is σ = 162312192. Its totient is φ = 105283008.

The previous prime is 133431943. The next prime is 133431971. The reversal of 133431955 is 559134331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133431955 - 2⁵ = 133431923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133431955.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 182419 + ... + 183148.

It is an arithmetic number, because the mean of its divisors is an integer number (20289024).

Almost surely, 2^133431955 is an apocalyptic number.

133431955 is a deficient number, since it is larger than the sum of its proper divisors (28880237).

133431955 is an equidigital number, since it uses as much as digits as its factorization.

133431955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365645.

The product of its digits is 24300, while the sum is 34.

The square root of 133431955 is about 11551.2750378476. The cubic root of 133431955 is about 510.9988817420.

The spelling of 133431955 in words is "one hundred thirty-three million, four hundred thirty-one thousand, nine hundred fifty-five".