201312443 has 4 divisors (see below), whose sum is σ = 201342288. Its totient is φ = 201282600.

The previous prime is 201312439. The next prime is 201312451. The reversal of 201312443 is 344213102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 344213102 = 2 ⋅172106551.

It is a cyclic number.

It is not a de Polignac number, because 201312443 - 2² = 201312439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201312413) 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, 530 + ... + 20072.

It is an arithmetic number, because the mean of its divisors is an integer number (50335572).

Almost surely, 2^201312443 is an apocalyptic number.

201312443 is a deficient number, since it is larger than the sum of its proper divisors (29845).

201312443 is a wasteful number, since it uses less digits than its factorization.

201312443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29844.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 201312443 is about 14188.4616149884. The cubic root of 201312443 is about 586.0799618701.

Adding to 201312443 its reverse (344213102), we get a palindrome (545525545).

The spelling of 201312443 in words is "two hundred one million, three hundred twelve thousand, four hundred forty-three".