201312403 has 4 divisors (see below), whose sum is σ = 208254240. Its totient is φ = 194370568.

The previous prime is 201312401. The next prime is 201312407. The reversal of 201312403 is 304213102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304213102 = 2 ⋅152106551.

It is a cyclic number.

It is not a de Polignac number, because 201312403 - 2¹ = 201312401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201312401) 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, 3470875 + ... + 3470932.

It is an arithmetic number, because the mean of its divisors is an integer number (52063560).

Almost surely, 2^201312403 is an apocalyptic number.

201312403 is a deficient number, since it is larger than the sum of its proper divisors (6941837).

201312403 is an equidigital number, since it uses as much as digits as its factorization.

201312403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941836.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 201312403 is about 14188.4602053923. The cubic root of 201312403 is about 586.0799230528.

Adding to 201312403 its reverse (304213102), we get a palindrome (505525505).

The spelling of 201312403 in words is "two hundred one million, three hundred twelve thousand, four hundred three".