205102849 has 8 divisors (see below), whose sum is σ = 234530048. Its totient is φ = 175707360.

The previous prime is 205102831. The next prime is 205102861. The reversal of 205102849 is 948201502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205102849 - 2²¹ = 203005697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205102849.

It is not an unprimeable number, because it can be changed into a prime (205102889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8104 + ... + 21814.

It is an arithmetic number, because the mean of its divisors is an integer number (29316256).

Almost surely, 2^205102849 is an apocalyptic number.

It is an amenable number.

205102849 is a deficient number, since it is larger than the sum of its proper divisors (29427199).

205102849 is a wasteful number, since it uses less digits than its factorization.

205102849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15855.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 205102849 is about 14321.4122557798. The cubic root of 205102849 is about 589.7354449270.

The spelling of 205102849 in words is "two hundred five million, one hundred two thousand, eight hundred forty-nine".