206056554 has 64 divisors (see below), whose sum is σ = 462938112. Its totient is φ = 60609600.

The previous prime is 206056553. The next prime is 206056567. The reversal of 206056554 is 455650602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (206056553) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 561279 + ... + 561645.

It is an arithmetic number, because the mean of its divisors is an integer number (7233408).

Almost surely, 2^206056554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206056554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231469056).

206056554 is an abundant number, since it is smaller than the sum of its proper divisors (256881558).

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

206056554 is a wasteful number, since it uses less digits than its factorization.

206056554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 206056554 is about 14354.6701111520. The cubic root of 206056554 is about 590.6480994633.

The spelling of 206056554 in words is "two hundred six million, fifty-six thousand, five hundred fifty-four".