205161254 has 16 divisors (see below), whose sum is σ = 320321520. Its totient is φ = 98431200.

The previous prime is 205161241. The next prime is 205161269. The reversal of 205161254 is 452161502.

It is a super-2 number, since 2×205161254² = 84182280285705032, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1397 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (20020095).

Almost surely, 2^205161254 is an apocalyptic number.

205161254 is a deficient number, since it is larger than the sum of its proper divisors (115160266).

205161254 is a wasteful number, since it uses less digits than its factorization.

205161254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21895.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 205161254 is about 14323.4511902684. The cubic root of 205161254 is about 589.7914172193.

The spelling of 205161254 in words is "two hundred five million, one hundred sixty-one thousand, two hundred fifty-four".