205522545 has 16 divisors (see below), whose sum is σ = 336857472. Its totient is φ = 106938240.

The previous prime is 205522523. The next prime is 205522561. The reversal of 205522545 is 545225502.

It is not a de Polignac number, because 205522545 - 2¹⁵ = 205489777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166477 + ... + 167706.

It is an arithmetic number, because the mean of its divisors is an integer number (21053592).

Almost surely, 2^205522545 is an apocalyptic number.

It is an amenable number.

205522545 is a deficient number, since it is larger than the sum of its proper divisors (131334927).

205522545 is a wasteful number, since it uses less digits than its factorization.

205522545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334232.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 205522545 is about 14336.0575124404. The cubic root of 205522545 is about 590.1374237005.

The spelling of 205522545 in words is "two hundred five million, five hundred twenty-two thousand, five hundred forty-five".