206145461 has 4 divisors (see below), whose sum is σ = 210035052. Its totient is φ = 202255872.

The previous prime is 206145419. The next prime is 206145473. The reversal of 206145461 is 164541602.

206145461 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, and also an emirpimes, since its reverse is a distinct semiprime: 164541602 = 2 ⋅82270801.

It can be written as a sum of positive squares in 2 ways, for example, as 83356900 + 122788561 = 9130^2 + 11081^2 .

It is a cyclic number.

It is not a de Polignac number, because 206145461 - 2¹⁸ = 205883317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206145491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944716 + ... + 1944821.

It is an arithmetic number, because the mean of its divisors is an integer number (52508763).

Almost surely, 2^206145461 is an apocalyptic number.

It is an amenable number.

206145461 is a deficient number, since it is larger than the sum of its proper divisors (3889591).

206145461 is an equidigital number, since it uses as much as digits as its factorization.

206145461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889590.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 206145461 is about 14357.7665742273. The cubic root of 206145461 is about 590.7330360156.

The spelling of 206145461 in words is "two hundred six million, one hundred forty-five thousand, four hundred sixty-one".