205272105 has 16 divisors (see below), whose sum is σ = 345721920. Its totient is φ = 103716288.

The previous prime is 205272103. The next prime is 205272149. The reversal of 205272105 is 501272502.

It is not a de Polignac number, because 205272105 - 2¹ = 205272103 is a prime.

It is a super-2 number, since 2×205272105² = 84273274182262050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205272101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359842 + ... + 360411.

It is an arithmetic number, because the mean of its divisors is an integer number (21607620).

Almost surely, 2^205272105 is an apocalyptic number.

It is an amenable number.

205272105 is a deficient number, since it is larger than the sum of its proper divisors (140449815).

205272105 is a wasteful number, since it uses less digits than its factorization.

205272105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720280.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 205272105 is about 14327.3202309434. The cubic root of 205272105 is about 589.8976218033.

The spelling of 205272105 in words is "two hundred five million, two hundred seventy-two thousand, one hundred five".