201000555 has 64 divisors (see below), whose sum is σ = 410618880. Its totient is φ = 91383552.

The previous prime is 201000523. The next prime is 201000581. The reversal of 201000555 is 555000102.

It is not a de Polignac number, because 201000555 - 2⁵ = 201000523 is a prime.

It is a super-2 number, since 2×201000555² = 80802446220616050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214047 + ... + 214983.

It is an arithmetic number, because the mean of its divisors is an integer number (6415920).

Almost surely, 2^201000555 is an apocalyptic number.

201000555 is an abundant number, since it is smaller than the sum of its proper divisors (209618325).

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

201000555 is a wasteful number, since it uses less digits than its factorization.

201000555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 201000555 is about 14177.4664520852. The cubic root of 201000555 is about 585.7771394122. Note that the first 3 decimals are identical.

Adding to 201000555 its reverse (555000102), we get a palindrome (756000657).

The spelling of 201000555 in words is "two hundred one million, five hundred fifty-five", and thus it is an aban number.