205701023 has 4 divisors (see below), whose sum is σ = 224401128. Its totient is φ = 187000920.

The previous prime is 205701007. The next prime is 205701053. The reversal of 205701023 is 320107502.

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 205701023 - 2⁴ = 205701007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205700986 and 205701004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205701053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9350036 + ... + 9350057.

It is an arithmetic number, because the mean of its divisors is an integer number (56100282).

Almost surely, 2^205701023 is an apocalyptic number.

205701023 is a deficient number, since it is larger than the sum of its proper divisors (18700105).

205701023 is a wasteful number, since it uses less digits than its factorization.

205701023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700104.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 205701023 is about 14342.2809552735. The cubic root of 205701023 is about 590.3082015146.

Adding to 205701023 its reverse (320107502), we get a palindrome (525808525).

The spelling of 205701023 in words is "two hundred five million, seven hundred one thousand, twenty-three".