200135520 has 144 divisors (see below), whose sum is σ = 735566832. Its totient is φ = 49259520.

The previous prime is 200135513. The next prime is 200135527. The reversal of 200135520 is 25531002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (200135513) and next prime (200135527).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 200135493 and 200135502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200135527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13375 + ... + 24065.

It is an arithmetic number, because the mean of its divisors is an integer number (5108103).

Almost surely, 2^200135520 is an apocalyptic number.

200135520 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 200135520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367783416).

200135520 is an abundant number, since it is smaller than the sum of its proper divisors (535431312).

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

200135520 is a wasteful number, since it uses less digits than its factorization.

200135520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725 (or 10714 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 200135520 is about 14146.9261678995. The cubic root of 200135520 is about 584.9356054476.

Adding to 200135520 its reverse (25531002), we get a palindrome (225666522).

The spelling of 200135520 in words is "two hundred million, one hundred thirty-five thousand, five hundred twenty".