205121414 has 16 divisors (see below), whose sum is σ = 320456736. Its totient is φ = 98380800.

The previous prime is 205121393. The next prime is 205121419. The reversal of 205121414 is 414121502.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205121419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14267 + ... + 24774.

It is an arithmetic number, because the mean of its divisors is an integer number (20028546).

Almost surely, 2^205121414 is an apocalyptic number.

205121414 is a deficient number, since it is larger than the sum of its proper divisors (115335322).

205121414 is a wasteful number, since it uses less digits than its factorization.

205121414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39151.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 205121414 is about 14322.0603964653. The cubic root of 205121414 is about 589.7532378023.

Adding to 205121414 its reverse (414121502), we get a palindrome (619242916).

The spelling of 205121414 in words is "two hundred five million, one hundred twenty-one thousand, four hundred fourteen".