213220313232194 has 4 divisors (see below), whose sum is σ = 319830469848294. Its totient is φ = 106610156616096.

The previous prime is 213220313232193. The next prime is 213220313232209. The reversal of 213220313232194 is 491232313022312.

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

It can be written as a sum of positive squares in only one way, i.e., 167495493420025 + 45724819812169 = 12942005^2 + 6762013^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213220313232193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53305078308047 + ... + 53305078308050.

Almost surely, 2^{213220313232194} is an apocalyptic number.

213220313232194 is a deficient number, since it is larger than the sum of its proper divisors (106610156616100).

213220313232194 is a wasteful number, since it uses less digits than its factorization.

213220313232194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106610156616099.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 213220313232194 in words is "two hundred thirteen trillion, two hundred twenty billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred ninety-four".