133431156 has 36 divisors (see below), whose sum is σ = 342819204. Its totient is φ = 43747200.

The previous prime is 133431149. The next prime is 133431173. The reversal of 133431156 is 651134331.

It can be written as a sum of positive squares in 2 ways, for example, as 59814756 + 73616400 = 7734^2 + 8580^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28185 + ... + 32576.

Almost surely, 2^133431156 is an apocalyptic number.

It is an amenable number.

133431156 is an abundant number, since it is smaller than the sum of its proper divisors (209388048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133431156 is a wasteful number, since it uses less digits than its factorization.

133431156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60832 (or 60827 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 133431156 is about 11551.2404528691. The cubic root of 133431156 is about 510.9978617742.

Adding to 133431156 its reverse (651134331), we get a palindrome (784565487).

The spelling of 133431156 in words is "one hundred thirty-three million, four hundred thirty-one thousand, one hundred fifty-six".