133131210 has 32 divisors (see below), whose sum is σ = 320110272. Its totient is φ = 35435520.

The previous prime is 133131209. The next prime is 133131227. The reversal of 133131210 is 12131331.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 133131210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13465 + ... + 21155.

It is an arithmetic number, because the mean of its divisors is an integer number (10003446).

Almost surely, 2^133131210 is an apocalyptic number.

133131210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133131210 is an abundant number, since it is smaller than the sum of its proper divisors (186979062).

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

133131210 is a wasteful number, since it uses less digits than its factorization.

133131210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 133131210 is about 11538.2498672892. The cubic root of 133131210 is about 510.6146760131.

Adding to 133131210 its reverse (12131331), we get a palindrome (145262541).

The spelling of 133131210 in words is "one hundred thirty-three million, one hundred thirty-one thousand, two hundred ten".