205655001 has 12 divisors (see below), whose sum is σ = 291286512. Its totient is φ = 129037888.

The previous prime is 205654997. The next prime is 205655003. The reversal of 205655001 is 100556502.

It is not a de Polignac number, because 205655001 - 2² = 205654997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205655003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117735 + ... + 119468.

It is an arithmetic number, because the mean of its divisors is an integer number (24273876).

Almost surely, 2^205655001 is an apocalyptic number.

It is an amenable number.

205655001 is a deficient number, since it is larger than the sum of its proper divisors (85631511).

205655001 is a wasteful number, since it uses less digits than its factorization.

205655001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237240 (or 237223 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 205655001 is about 14340.6764484804. The cubic root of 205655001 is about 590.2641745250.

The spelling of 205655001 in words is "two hundred five million, six hundred fifty-five thousand, one".