206181045 has 40 divisors (see below), whose sum is σ = 422404224. Its totient is φ = 94252896.

The previous prime is 206181023. The next prime is 206181067. The reversal of 206181045 is 540181602.

206181045 is a `hidden beast` number, since 2 + 0 + 618 + 1 + 0 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (206181023) and next prime (206181067).

It is not a de Polignac number, because 206181045 - 2⁵ = 206181013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33529 + ... + 39198.

Almost surely, 2^206181045 is an apocalyptic number.

It is an amenable number.

206181045 is an abundant number, since it is smaller than the sum of its proper divisors (216223179).

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

206181045 is an equidigital number, since it uses as much as digits as its factorization.

206181045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72751 (or 72742 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 206181045 is about 14359.0057107030. The cubic root of 206181045 is about 590.7670240467.

The spelling of 206181045 in words is "two hundred six million, one hundred eighty-one thousand, forty-five".