205034421 has 8 divisors (see below), whose sum is σ = 273979264. Its totient is φ = 136389600.

The previous prime is 205034419. The next prime is 205034441. The reversal of 205034421 is 124430502.

205034421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205034421 - 2¹ = 205034419 is a prime.

It is a super-2 number, since 2×205034421² = 84078227589610482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205034411) 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, 73405 + ... + 76146.

It is an arithmetic number, because the mean of its divisors is an integer number (34247408).

Almost surely, 2^205034421 is an apocalyptic number.

It is an amenable number.

205034421 is a deficient number, since it is larger than the sum of its proper divisors (68944843).

205034421 is a wasteful number, since it uses less digits than its factorization.

205034421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150011.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 205034421 is about 14319.0230462836. The cubic root of 205034421 is about 589.6698535975.

Adding to 205034421 its reverse (124430502), we get a palindrome (329464923).

The spelling of 205034421 in words is "two hundred five million, thirty-four thousand, four hundred twenty-one".