206551436 has 24 divisors (see below), whose sum is σ = 444880800. Its totient is φ = 81712512.

The previous prime is 206551379. The next prime is 206551439. The reversal of 206551436 is 634155602.

It is not an unprimeable number, because it can be changed into a prime (206551439) 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, 283361 + ... + 284088.

It is an arithmetic number, because the mean of its divisors is an integer number (18536700).

Almost surely, 2^206551436 is an apocalyptic number.

206551436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

206551436 is an abundant number, since it is smaller than the sum of its proper divisors (238329364).

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

206551436 is a wasteful number, since it uses less digits than its factorization.

206551436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567473 (or 567471 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 206551436 is about 14371.8974390997. The cubic root of 206551436 is about 591.1205707569.

The spelling of 206551436 in words is "two hundred six million, five hundred fifty-one thousand, four hundred thirty-six".