201312241 has 4 divisors (see below), whose sum is σ = 216797812. Its totient is φ = 185826672.

The previous prime is 201312217. The next prime is 201312257. The reversal of 201312241 is 142213102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142213102 = 2 ⋅71106551.

It can be written as a sum of positive squares in 2 ways, for example, as 90326016 + 110986225 = 9504^2 + 10535^2 .

It is a cyclic number.

It is not a de Polignac number, because 201312241 - 2²¹ = 199215089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201312211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7742766 + ... + 7742791.

It is an arithmetic number, because the mean of its divisors is an integer number (54199453).

Almost surely, 2^201312241 is an apocalyptic number.

It is an amenable number.

201312241 is a deficient number, since it is larger than the sum of its proper divisors (15485571).

201312241 is a wasteful number, since it uses less digits than its factorization.

201312241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15485570.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 201312241 is about 14188.4544965264. The cubic root of 201312241 is about 586.0797658428.

Subtracting from 201312241 its product of nonzero digits (96), we obtain a triangular number (201312145 = T₂₀₀₆₅).

Adding to 201312241 its reverse (142213102), we get a palindrome (343525343).

The spelling of 201312241 in words is "two hundred one million, three hundred twelve thousand, two hundred forty-one".