205401481 has 2 divisors, whose sum is σ = 205401482. Its totient is φ = 205401480.

The previous prime is 205401433. The next prime is 205401517. The reversal of 205401481 is 184104502.

205401481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156625225 + 48776256 = 12515^2 + 6984^2 .

It is a cyclic number.

It is not a de Polignac number, because 205401481 - 2¹⁷ = 205270409 is a prime.

It is a super-2 number, since 2×205401481² = 84379536793986722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205401401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102700740 + 102700741.

It is an arithmetic number, because the mean of its divisors is an integer number (102700741).

Almost surely, 2^205401481 is an apocalyptic number.

It is an amenable number.

205401481 is a deficient number, since it is larger than the sum of its proper divisors (1).

205401481 is an equidigital number, since it uses as much as digits as its factorization.

205401481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 205401481 is about 14331.8345301640. The cubic root of 205401481 is about 590.0215265535.

Adding to 205401481 its reverse (184104502), we get a palindrome (389505983).

The spelling of 205401481 in words is "two hundred five million, four hundred one thousand, four hundred eighty-one".