200155280 has 80 divisors (see below), whose sum is σ = 530684784. Its totient is φ = 69550080.

The previous prime is 200155261. The next prime is 200155289. The reversal of 200155280 is 82551002.

It can be written as a sum of positive squares in 8 ways, for example, as 26337424 + 173817856 = 5132^2 + 13184^2 .

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

It is a super-2 number, since 2×200155280² = 80124272223756800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200155289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12020 + ... + 23340.

Almost surely, 2^200155280 is an apocalyptic number.

200155280 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 200155280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265342392).

200155280 is an abundant number, since it is smaller than the sum of its proper divisors (330529504).

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

200155280 is a wasteful number, since it uses less digits than its factorization.

200155280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364 (or 11358 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 200155280 is about 14147.6245355890. The cubic root of 200155280 is about 584.9548556489.

The spelling of 200155280 in words is "two hundred million, one hundred fifty-five thousand, two hundred eighty".