201013640 has 32 divisors (see below), whose sum is σ = 452905560. Its totient is φ = 80294400.

The previous prime is 201013639. The next prime is 201013669. The reversal of 201013640 is 46310102.

It can be written as a sum of positive squares in 4 ways, for example, as 97259044 + 103754596 = 9862^2 + 10186^2 .

It is a super-3 number, since 3×201013640³ (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, 29780 + ... + 35900.

Almost surely, 2^201013640 is an apocalyptic number.

201013640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201013640 is an abundant number, since it is smaller than the sum of its proper divisors (251891920).

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

201013640 is a wasteful number, since it uses less digits than its factorization.

201013640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6953 (or 6949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 201013640 is about 14177.9279163071. The cubic root of 201013640 is about 585.7898503680.

Adding to 201013640 its reverse (46310102), we get a palindrome (247323742).

The spelling of 201013640 in words is "two hundred one million, thirteen thousand, six hundred forty".