201640544 has 48 divisors (see below), whose sum is σ = 454745088. Its totient is φ = 86216832.

The previous prime is 201640511. The next prime is 201640561. The reversal of 201640544 is 445046102.

It is a super-3 number, since 3×201640544³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 135227 + ... + 136709.

It is an arithmetic number, because the mean of its divisors is an integer number (9473856).

Almost surely, 2^201640544 is an apocalyptic number.

It is an amenable number.

201640544 is an abundant number, since it is smaller than the sum of its proper divisors (253104544).

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

201640544 is a wasteful number, since it uses less digits than its factorization.

201640544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 201640544 is about 14200.0191549167. The cubic root of 201640544 is about 586.3981886787.

Adding to 201640544 its reverse (445046102), we get a palindrome (646686646).

The spelling of 201640544 in words is "two hundred one million, six hundred forty thousand, five hundred forty-four".