205297154 has 4 divisors (see below), whose sum is σ = 307945734. Its totient is φ = 102648576.

The previous prime is 205297153. The next prime is 205297171. The reversal of 205297154 is 451792502.

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

It can be written as a sum of positive squares in only one way, i.e., 205262929 + 34225 = 14327^2 + 185^2 .

It is not an unprimeable number, because it can be changed into a prime (205297153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51324287 + ... + 51324290.

Almost surely, 2^205297154 is an apocalyptic number.

205297154 is a deficient number, since it is larger than the sum of its proper divisors (102648580).

205297154 is a wasteful number, since it uses less digits than its factorization.

205297154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102648579.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 205297154 is about 14328.1943733326. The cubic root of 205297154 is about 589.9216155562.

The spelling of 205297154 in words is "two hundred five million, two hundred ninety-seven thousand, one hundred fifty-four".