205416355 has 16 divisors (see below), whose sum is σ = 267369984. Its totient is φ = 150891520.

The previous prime is 205416331. The next prime is 205416377. The reversal of 205416355 is 553614502.

It is not a de Polignac number, because 205416355 - 2²⁷ = 71198627 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, 25987 + ... + 32956.

It is an arithmetic number, because the mean of its divisors is an integer number (16710624).

Almost surely, 2^205416355 is an apocalyptic number.

205416355 is a deficient number, since it is larger than the sum of its proper divisors (61953629).

205416355 is a wasteful number, since it uses less digits than its factorization.

205416355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59006.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 205416355 is about 14332.3534354969. The cubic root of 205416355 is about 590.0357682040.

It can be divided in two parts, 20541 and 6355, that added together give a square (26896 = 164²).

The spelling of 205416355 in words is "two hundred five million, four hundred sixteen thousand, three hundred fifty-five".