205613461 has 2 divisors, whose sum is σ = 205613462. Its totient is φ = 205613460.

The previous prime is 205613437. The next prime is 205613531. The reversal of 205613461 is 164316502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183467025 + 22146436 = 13545^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 205613461 - 2⁹ = 205612949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205613411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102806730 + 102806731.

It is an arithmetic number, because the mean of its divisors is an integer number (102806731).

Almost surely, 2^205613461 is an apocalyptic number.

It is an amenable number.

205613461 is a deficient number, since it is larger than the sum of its proper divisors (1).

205613461 is an equidigital number, since it uses as much as digits as its factorization.

205613461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 205613461 is about 14339.2280475624. The cubic root of 205613461 is about 590.2244296047.

Adding to 205613461 its reverse (164316502), we get a palindrome (369929963).

The spelling of 205613461 in words is "two hundred five million, six hundred thirteen thousand, four hundred sixty-one".