206045621 has 8 divisors (see below), whose sum is σ = 209203200. Its totient is φ = 202895280.

The previous prime is 206045599. The next prime is 206045663. The reversal of 206045621 is 126540602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-206045621 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 (206045681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89675 + ... + 91943.

It is an arithmetic number, because the mean of its divisors is an integer number (26150400).

Almost surely, 2^206045621 is an apocalyptic number.

It is an amenable number.

206045621 is a deficient number, since it is larger than the sum of its proper divisors (3157579).

206045621 is a wasteful number, since it uses less digits than its factorization.

206045621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 206045621 is about 14354.2892892682. The cubic root of 206045621 is about 590.6376530272.

The spelling of 206045621 in words is "two hundred six million, forty-five thousand, six hundred twenty-one".