201155560 has 48 divisors (see below), whose sum is σ = 480817260. Its totient is φ = 75724800.

The previous prime is 201155557. The next prime is 201155579. The reversal of 201155560 is 65551102.

It can be written as a sum of positive squares in 6 ways, for example, as 152127556 + 49028004 = 12334^2 + 7002^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2860 + ... + 20260.

Almost surely, 2^201155560 is an apocalyptic number.

201155560 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 201155560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240408630).

201155560 is an abundant number, since it is smaller than the sum of its proper divisors (279661700).

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

201155560 is a wasteful number, since it uses less digits than its factorization.

201155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17446 (or 17425 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 201155560 is about 14182.9319958886. The cubic root of 201155560 is about 585.9276780600.

The spelling of 201155560 in words is "two hundred one million, one hundred fifty-five thousand, five hundred sixty".