213851193 has 4 divisors (see below), whose sum is σ = 285134928. Its totient is φ = 142567460.

The previous prime is 213851189. The next prime is 213851221. The reversal of 213851193 is 391158312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213851193 - 2² = 213851189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213851173) 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, 35641863 + ... + 35641868.

It is an arithmetic number, because the mean of its divisors is an integer number (71283732).

Almost surely, 2^213851193 is an apocalyptic number.

It is an amenable number.

213851193 is a deficient number, since it is larger than the sum of its proper divisors (71283735).

213851193 is an equidigital number, since it uses as much as digits as its factorization.

213851193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71283734.

The product of its digits is 6480, while the sum is 33.

The square root of 213851193 is about 14623.6518352975. The cubic root of 213851193 is about 598.0037294279.

It can be divided in two parts, 21385 and 1193, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 213851193 in words is "two hundred thirteen million, eight hundred fifty-one thousand, one hundred ninety-three".