206543545 has 16 divisors (see below), whose sum is σ = 275530752. Its totient is φ = 147602880.

The previous prime is 206543543. The next prime is 206543551. The reversal of 206543545 is 545345602.

It is not a de Polignac number, because 206543545 - 2¹ = 206543543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206543545.

It is not an unprimeable number, because it can be changed into a prime (206543543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49237 + ... + 53266.

It is an arithmetic number, because the mean of its divisors is an integer number (17220672).

Almost surely, 2^206543545 is an apocalyptic number.

It is an amenable number.

206543545 is a deficient number, since it is larger than the sum of its proper divisors (68987207).

206543545 is a wasteful number, since it uses less digits than its factorization.

206543545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102552.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 206543545 is about 14371.6229076608. The cubic root of 206543545 is about 591.1130430245.

The spelling of 206543545 in words is "two hundred six million, five hundred forty-three thousand, five hundred forty-five".