201132440 has 96 divisors (see below), whose sum is σ = 488056320. Its totient is φ = 74575872.

The previous prime is 201132431. The next prime is 201132443. The reversal of 201132440 is 44231102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201132443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1468052 + ... + 1468188.

It is an arithmetic number, because the mean of its divisors is an integer number (5083920).

Almost surely, 2^201132440 is an apocalyptic number.

201132440 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 201132440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244028160).

201132440 is an abundant number, since it is smaller than the sum of its proper divisors (286923880).

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

201132440 is a wasteful number, since it uses less digits than its factorization.

201132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 201132440 is about 14182.1169082757. The cubic root of 201132440 is about 585.9052291537.

Adding to 201132440 its reverse (44231102), we get a palindrome (245363542).

The spelling of 201132440 in words is "two hundred one million, one hundred thirty-two thousand, four hundred forty".