205610001 has 16 divisors (see below), whose sum is σ = 288939840. Its totient is φ = 129695040.

The previous prime is 205609997. The next prime is 205610057. The reversal of 205610001 is 100016502.

It is not a de Polignac number, because 205610001 - 2² = 205609997 is a prime.

It is a super-2 number, since 2×205610001² = 84550945022440002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205610071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56431 + ... + 59963.

It is an arithmetic number, because the mean of its divisors is an integer number (18058740).

Almost surely, 2^205610001 is an apocalyptic number.

It is an amenable number.

205610001 is a deficient number, since it is larger than the sum of its proper divisors (83329839).

205610001 is a wasteful number, since it uses less digits than its factorization.

205610001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 205610001 is about 14339.1073989980. The cubic root of 205610001 is about 590.2211188812.

Adding to 205610001 its reverse (100016502), we get a palindrome (305626503).

The spelling of 205610001 in words is "two hundred five million, six hundred ten thousand, one".