205401056 has 48 divisors (see below), whose sum is σ = 463325184. Its totient is φ = 87805824.

The previous prime is 205401047. The next prime is 205401061. The reversal of 205401056 is 650104502.

205401056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111761 + ... + 113583.

It is an arithmetic number, because the mean of its divisors is an integer number (9652608).

Almost surely, 2^205401056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205401056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231662592).

205401056 is an abundant number, since it is smaller than the sum of its proper divisors (257924128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205401056 is a wasteful number, since it uses less digits than its factorization.

205401056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 205401056 is about 14331.8197030245. The cubic root of 205401056 is about 590.0211196117.

Adding to 205401056 its reverse (650104502), we get a palindrome (855505558).

The spelling of 205401056 in words is "two hundred five million, four hundred one thousand, fifty-six".