213648133 has 4 divisors (see below), whose sum is σ = 221015340. Its totient is φ = 206280928.

The previous prime is 213648121. The next prime is 213648167. The reversal of 213648133 is 331846312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48191364 + 165456769 = 6942^2 + 12863^2 .

It is a cyclic number.

It is not a de Polignac number, because 213648133 - 2¹⁷ = 213517061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213648095 and 213648104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213648433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683560 + ... + 3683617.

It is an arithmetic number, because the mean of its divisors is an integer number (55253835).

Almost surely, 2^213648133 is an apocalyptic number.

It is an amenable number.

213648133 is a deficient number, since it is larger than the sum of its proper divisors (7367207).

213648133 is an equidigital number, since it uses as much as digits as its factorization.

213648133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367206.

The product of its digits is 10368, while the sum is 31.

The square root of 213648133 is about 14616.7073241548. The cubic root of 213648133 is about 597.8143935783.

The spelling of 213648133 in words is "two hundred thirteen million, six hundred forty-eight thousand, one hundred thirty-three".