201242511 has 6 divisors (see below), whose sum is σ = 290683640. Its totient is φ = 134161668.

The previous prime is 201242507. The next prime is 201242521. The reversal of 201242511 is 115242102.

It is not a de Polignac number, because 201242511 - 2² = 201242507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201242521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11180131 + ... + 11180148.

Almost surely, 2^201242511 is an apocalyptic number.

201242511 is a deficient number, since it is larger than the sum of its proper divisors (89441129).

201242511 is a wasteful number, since it uses less digits than its factorization.

201242511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22360285 (or 22360282 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 201242511 is about 14185.9970040882. The cubic root of 201242511 is about 586.0120897769.

Adding to 201242511 its reverse (115242102), we get a palindrome (316484613).

The spelling of 201242511 in words is "two hundred one million, two hundred forty-two thousand, five hundred eleven".