133431013 has 8 divisors (see below), whose sum is σ = 134679168. Its totient is φ = 132187104.

The previous prime is 133431007. The next prime is 133431031. The reversal of 133431013 is 310134331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133431013 is a prime.

It is a super-4 number, since 4×133431013⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431083) 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, 120420 + ... + 121522.

It is an arithmetic number, because the mean of its divisors is an integer number (16834896).

Almost surely, 2^133431013 is an apocalyptic number.

It is an amenable number.

133431013 is a deficient number, since it is larger than the sum of its proper divisors (1248155).

133431013 is a wasteful number, since it uses less digits than its factorization.

133431013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 133431013 is about 11551.2342630560. The cubic root of 133431013 is about 510.9976792263.

Adding to 133431013 its reverse (310134331), we get a palindrome (443565344).

The spelling of 133431013 in words is "one hundred thirty-three million, four hundred thirty-one thousand, thirteen".