133861213 has 8 divisors (see below), whose sum is σ = 149195520. Its totient is φ = 119355840.

The previous prime is 133861207. The next prime is 133861229. The reversal of 133861213 is 312168331.

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-133861213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133862213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 206893 + ... + 207538.

It is an arithmetic number, because the mean of its divisors is an integer number (18649440).

Almost surely, 2^133861213 is an apocalyptic number.

It is an amenable number.

133861213 is a deficient number, since it is larger than the sum of its proper divisors (15334307).

133861213 is a wasteful number, since it uses less digits than its factorization.

133861213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414467.

The product of its digits is 2592, while the sum is 28.

The square root of 133861213 is about 11569.8406644171. The cubic root of 133861213 is about 511.5462657544.

The spelling of 133861213 in words is "one hundred thirty-three million, eight hundred sixty-one thousand, two hundred thirteen".