201111552 has 96 divisors (see below), whose sum is σ = 595904400. Its totient is φ = 67018752.

The previous prime is 201111551. The next prime is 201111553. The reversal of 201111552 is 255111102.

201111552 is a `hidden beast` number, since 2 + 0 + 1 + 111 + 552 = 666.

It is an interprime number because it is at equal distance from previous prime (201111551) and next prime (201111553).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53478 + ... + 57114.

Almost surely, 2^201111552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201111552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297952200).

201111552 is an abundant number, since it is smaller than the sum of its proper divisors (394792848).

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

201111552 is an equidigital number, since it uses as much as digits as its factorization.

201111552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 201111552 is about 14181.3804687696. The cubic root of 201111552 is about 585.8849459809.

Adding to 201111552 its reverse (255111102), we get a palindrome (456222654).

The spelling of 201111552 in words is "two hundred one million, one hundred eleven thousand, five hundred fifty-two".