201240013 has 8 divisors (see below), whose sum is σ = 222006456. Its totient is φ = 181228800.

The previous prime is 201239971. The next prime is 201240029. The reversal of 201240013 is 310042102.

It can be written as a sum of positive squares in 4 ways, for example, as 110889 + 201129124 = 333^2 + 14182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201240013 - 2²¹ = 199142861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201239975 and 201240002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201240113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188248 + ... + 189313.

It is an arithmetic number, because the mean of its divisors is an integer number (27750807).

Almost surely, 2^201240013 is an apocalyptic number.

It is an amenable number.

201240013 is a deficient number, since it is larger than the sum of its proper divisors (20766443).

201240013 is a wasteful number, since it uses less digits than its factorization.

201240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377615.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201240013 is about 14185.9089592454. The cubic root of 201240013 is about 586.0096650667.

Adding to 201240013 its reverse (310042102), we get a palindrome (511282115).

It can be divided in two parts, 2012 and 40013, that added together give a square (42025 = 205²).

The spelling of 201240013 in words is "two hundred one million, two hundred forty thousand, thirteen".