200531900 has 18 divisors (see below), whose sum is σ = 435154440. Its totient is φ = 80212720.

The previous prime is 200531893. The next prime is 200531921. The reversal of 200531900 is 9135002.

It is a super-2 number, since 2×200531900² = 80426085835220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1002560 + ... + 1002759.

Almost surely, 2^200531900 is an apocalyptic number.

200531900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200531900 is an abundant number, since it is smaller than the sum of its proper divisors (234622540).

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

200531900 is a wasteful number, since it uses less digits than its factorization.

200531900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005333 (or 2005326 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 200531900 is about 14160.9286418653. The cubic root of 200531900 is about 585.3215170787.

Adding to 200531900 its reverse (9135002), we get a palindrome (209666902).

The spelling of 200531900 in words is "two hundred million, five hundred thirty-one thousand, nine hundred".