200051778 has 16 divisors (see below), whose sum is σ = 400276800. Its totient is φ = 66655056.

The previous prime is 200051777. The next prime is 200051783. The reversal of 200051778 is 877150002.

It is a happy number.

It is a super-2 number, since 2×200051778² = 80041427761922568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200051777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11548 + ... + 23096.

It is an arithmetic number, because the mean of its divisors is an integer number (25017300).

Almost surely, 2^200051778 is an apocalyptic number.

200051778 is an abundant number, since it is smaller than the sum of its proper divisors (200225022).

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

200051778 is a wasteful number, since it uses less digits than its factorization.

200051778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14441.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 200051778 is about 14143.9661340092. The cubic root of 200051778 is about 584.8540098849.

The spelling of 200051778 in words is "two hundred million, fifty-one thousand, seven hundred seventy-eight".