206621450 has 48 divisors (see below), whose sum is σ = 449465280. Its totient is φ = 69189120.

The previous prime is 206621449. The next prime is 206621461. The reversal of 206621450 is 54126602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8186 + ... + 21914.

It is an arithmetic number, because the mean of its divisors is an integer number (9363860).

Almost surely, 2^206621450 is an apocalyptic number.

206621450 is an abundant number, since it is smaller than the sum of its proper divisors (242843830).

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

206621450 is a wasteful number, since it uses less digits than its factorization.

206621450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13791 (or 13786 counting only the distinct ones).

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

The square root of 206621450 is about 14374.3330280052. Note that the first 3 decimals coincide. The cubic root of 206621450 is about 591.1873532189.

The spelling of 206621450 in words is "two hundred six million, six hundred twenty-one thousand, four hundred fifty".