201555828 has 36 divisors (see below), whose sum is σ = 510007680. Its totient is φ = 67116816.

The previous prime is 201555821. The next prime is 201555853. The reversal of 201555828 is 828555102.

201555828 is a `hidden beast` number, since 20 + 1 + 55 + 582 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 201555792 and 201555801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201555821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43101 + ... + 47547.

It is an arithmetic number, because the mean of its divisors is an integer number (14166880).

Almost surely, 2^201555828 is an apocalyptic number.

It is an amenable number.

201555828 is an abundant number, since it is smaller than the sum of its proper divisors (308451852).

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

201555828 is a wasteful number, since it uses less digits than its factorization.

201555828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5716 (or 5711 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 201555828 is about 14197.0358878183. The cubic root of 201555828 is about 586.3160552833.

The spelling of 201555828 in words is "two hundred one million, five hundred fifty-five thousand, eight hundred twenty-eight".