213244806171 has 4 divisors (see below), whose sum is σ = 284326408232. Its totient is φ = 142163204112.

The previous prime is 213244806121. The next prime is 213244806209. The reversal of 213244806171 is 171608442312.

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

It is not a de Polignac number, because 213244806171 - 2¹⁵ = 213244773403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244806121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35540801026 + ... + 35540801031.

It is an arithmetic number, because the mean of its divisors is an integer number (71081602058).

Almost surely, 2^213244806171 is an apocalyptic number.

213244806171 is a deficient number, since it is larger than the sum of its proper divisors (71081602061).

213244806171 is an equidigital number, since it uses as much as digits as its factorization.

213244806171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71081602060.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 213244806171 in words is "two hundred thirteen billion, two hundred forty-four million, eight hundred six thousand, one hundred seventy-one".