194216231 has 4 divisors (see below), whose sum is σ = 211872264. Its totient is φ = 176560200.

The previous prime is 194216227. The next prime is 194216237. The reversal of 194216231 is 132612491.

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

It is a cyclic number.

It is not a de Polignac number, because 194216231 - 2² = 194216227 is a prime.

It is a super-2 number, since 2×194216231² = 75439888767690722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194216194 and 194216203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194216237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8828000 + ... + 8828021.

It is an arithmetic number, because the mean of its divisors is an integer number (52968066).

Almost surely, 2^194216231 is an apocalyptic number.

194216231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194216231 is a deficient number, since it is larger than the sum of its proper divisors (17656033).

194216231 is a wasteful number, since it uses less digits than its factorization.

194216231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17656032.

The product of its digits is 2592, while the sum is 29.

The square root of 194216231 is about 13936.1483559842. The cubic root of 194216231 is about 579.1110351295. Note that the first 3 decimals are identical.

It can be divided in two parts, 19421 and 6231, that added together give a palindrome (25652).

The spelling of 194216231 in words is "one hundred ninety-four million, two hundred sixteen thousand, two hundred thirty-one".