201256560 has 60 divisors (see below), whose sum is σ = 675889032. Its totient is φ = 53668224.

The previous prime is 201256553. The next prime is 201256597. The reversal of 201256560 is 65652102.

201256560 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 5 + 656 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139042 + ... + 140481.

Almost surely, 2^201256560 is an apocalyptic number.

201256560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201256560 is an abundant number, since it is smaller than the sum of its proper divisors (474632472).

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

201256560 is a wasteful number, since it uses less digits than its factorization.

201256560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279542 (or 279533 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 201256560 is about 14186.4921668466. The cubic root of 201256560 is about 586.0257262135.

The spelling of 201256560 in words is "two hundred one million, two hundred fifty-six thousand, five hundred sixty".