205151254 has 16 divisors (see below), whose sum is σ = 383659776. Its totient is φ = 79929000.

The previous prime is 205151239. The next prime is 205151279. The reversal of 205151254 is 452151502.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

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, 665922 + ... + 666229.

It is an arithmetic number, because the mean of its divisors is an integer number (23978736).

Almost surely, 2^205151254 is an apocalyptic number.

205151254 is a deficient number, since it is larger than the sum of its proper divisors (178508522).

205151254 is a wasteful number, since it uses less digits than its factorization.

205151254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332171.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 205151254 is about 14323.1021081329. The cubic root of 205151254 is about 589.7818344969.

The spelling of 205151254 in words is "two hundred five million, one hundred fifty-one thousand, two hundred fifty-four".