201171240 has 96 divisors (see below), whose sum is σ = 688240800. Its totient is φ = 50820480.

The previous prime is 201171203. The next prime is 201171247. The reversal of 201171240 is 42171102.

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

It is not an unprimeable number, because it can be changed into a prime (201171247) 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, 7866 + ... + 21545.

It is an arithmetic number, because the mean of its divisors is an integer number (7169175).

Almost surely, 2^201171240 is an apocalyptic number.

201171240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201171240 is an abundant number, since it is smaller than the sum of its proper divisors (487069560).

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

201171240 is a wasteful number, since it uses less digits than its factorization.

201171240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29447 (or 29440 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 201171240 is about 14183.4847622155. The cubic root of 201171240 is about 585.9429019449.

The spelling of 201171240 in words is "two hundred one million, one hundred seventy-one thousand, two hundred forty".