205154315 has 4 divisors (see below), whose sum is σ = 246185184. Its totient is φ = 164123448.

The previous prime is 205154297. The next prime is 205154353. The reversal of 205154315 is 513451502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205154315 - 2²⁰ = 204105739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20515427 + ... + 20515436.

It is an arithmetic number, because the mean of its divisors is an integer number (61546296).

Almost surely, 2^205154315 is an apocalyptic number.

205154315 is a deficient number, since it is larger than the sum of its proper divisors (41030869).

205154315 is an equidigital number, since it uses as much as digits as its factorization.

205154315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41030868.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205154315 is about 14323.2089630781. The cubic root of 205154315 is about 589.7847678013.

The spelling of 205154315 in words is "two hundred five million, one hundred fifty-four thousand, three hundred fifteen".