201105640 has 32 divisors (see below), whose sum is σ = 453703680. Its totient is φ = 80226112.

The previous prime is 201105623. The next prime is 201105679. The reversal of 201105640 is 46501102.

It is a super-3 number, since 3×201105640³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8757 + ... + 21883.

It is an arithmetic number, because the mean of its divisors is an integer number (14178240).

Almost surely, 2^201105640 is an apocalyptic number.

201105640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201105640 is an abundant number, since it is smaller than the sum of its proper divisors (252598040).

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

201105640 is a wasteful number, since it uses less digits than its factorization.

201105640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13521 (or 13517 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 201105640 is about 14181.1720249068. The cubic root of 201105640 is about 585.8792049121.

Adding to 201105640 its reverse (46501102), we get a palindrome (247606742).

The spelling of 201105640 in words is "two hundred one million, one hundred five thousand, six hundred forty".