200551440 has 80 divisors (see below), whose sum is σ = 630281088. Its totient is φ = 52743168.

The previous prime is 200551399. The next prime is 200551453. The reversal of 200551440 is 44155002.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11797 + ... + 23243.

Almost surely, 2^200551440 is an apocalyptic number.

200551440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200551440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315140544).

200551440 is an abundant number, since it is smaller than the sum of its proper divisors (429729648).

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

200551440 is a wasteful number, since it uses less digits than its factorization.

200551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11536 (or 11530 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 200551440 is about 14161.6185515639. The cubic root of 200551440 is about 585.3405278711.

The spelling of 200551440 in words is "two hundred million, five hundred fifty-one thousand, four hundred forty".