205021701 has 24 divisors (see below), whose sum is σ = 310040640. Its totient is φ = 130306176.

The previous prime is 205021673. The next prime is 205021759. The reversal of 205021701 is 107120502.

It is not a de Polignac number, because 205021701 - 2¹⁰ = 205020677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205021301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68290 + ... + 71228.

It is an arithmetic number, because the mean of its divisors is an integer number (12918360).

Almost surely, 2^205021701 is an apocalyptic number.

It is an amenable number.

205021701 is a deficient number, since it is larger than the sum of its proper divisors (105018939).

205021701 is a wasteful number, since it uses less digits than its factorization.

205021701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305 (or 3302 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 205021701 is about 14318.5788750141. The cubic root of 205021701 is about 589.6576592944.

The spelling of 205021701 in words is "two hundred five million, twenty-one thousand, seven hundred one".