205525505 has 16 divisors (see below), whose sum is σ = 255350784. Its totient is φ = 158639040.

The previous prime is 205525487. The next prime is 205525511. The reversal of 205525505 is 505525502.

It is a happy number.

It is not a de Polignac number, because 205525505 - 2¹⁴ = 205509121 is a prime.

It is a Duffinian number.

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, 55079 + ... + 58691.

It is an arithmetic number, because the mean of its divisors is an integer number (15959424).

Almost surely, 2^205525505 is an apocalyptic number.

It is an amenable number.

205525505 is a deficient number, since it is larger than the sum of its proper divisors (49825279).

205525505 is a wasteful number, since it uses less digits than its factorization.

205525505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its (nonzero) digits is 12500, while the sum is 29.

The square root of 205525505 is about 14336.1607482617. The cubic root of 205525505 is about 590.1402568015.

The spelling of 205525505 in words is "two hundred five million, five hundred twenty-five thousand, five hundred five".