205472405 has 4 divisors (see below), whose sum is σ = 246566892. Its totient is φ = 164377920.

The previous prime is 205472383. The next prime is 205472417. The reversal of 205472405 is 504274502.

It is a happy number.

205472405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57168721 + 148303684 = 7561^2 + 12178^2 .

It is a de Polignac number, because none of the positive numbers 2^k-205472405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20547236 + ... + 20547245.

It is an arithmetic number, because the mean of its divisors is an integer number (61641723).

Almost surely, 2^205472405 is an apocalyptic number.

It is an amenable number.

205472405 is a deficient number, since it is larger than the sum of its proper divisors (41094487).

205472405 is an equidigital number, since it uses as much as digits as its factorization.

205472405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41094486.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 205472405 is about 14334.3086683663. The cubic root of 205472405 is about 590.0894291330.

The spelling of 205472405 in words is "two hundred five million, four hundred seventy-two thousand, four hundred five".