205106655 has 16 divisors (see below), whose sum is σ = 353414880. Its totient is φ = 100975488.

The previous prime is 205106623. The next prime is 205106669. The reversal of 205106655 is 556601502.

It is not a de Polignac number, because 205106655 - 2⁵ = 205106623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525720 + ... + 526109.

It is an arithmetic number, because the mean of its divisors is an integer number (22088430).

Almost surely, 2^205106655 is an apocalyptic number.

205106655 is a deficient number, since it is larger than the sum of its proper divisors (148308225).

205106655 is a wasteful number, since it uses less digits than its factorization.

205106655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051850.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 205106655 is about 14321.5451331202. The cubic root of 205106655 is about 589.7390927217.

It can be divided in two parts, 205106 and 655, that added together give a triangular number (205761 = T₆₄₁).

The spelling of 205106655 in words is "two hundred five million, one hundred six thousand, six hundred fifty-five".