204951 has 8 divisors (see below), whose sum is σ = 278640. Its totient is φ = 133952.

The previous prime is 204947. The next prime is 204973. The reversal of 204951 is 159402.

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 204951 - 2² = 204947 is a prime.

204951 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (34830).

2²⁰⁴⁹⁵¹ is an apocalyptic number.

204951 is a deficient number, since it is larger than the sum of its proper divisors (73689).

204951 is a wasteful number, since it uses less digits than its factorization.

204951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 204951 is about 452.7151422252. The cubic root of 204951 is about 58.9589871057.

The spelling of 204951 in words is "two hundred four thousand, nine hundred fifty-one".