201323304431 has 4 divisors (see below), whose sum is σ = 201589254072. Its totient is φ = 201057354792.

The previous prime is 201323304421. The next prime is 201323304487. The reversal of 201323304431 is 134403323102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201323304431 - 2¹⁰ = 201323303407 is a prime.

It is a super-2 number, since 2×201323304431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201323304431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201323304421) 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, 132973685 + ... + 132975198.

It is an arithmetic number, because the mean of its divisors is an integer number (50397313518).

Almost surely, 2^201323304431 is an apocalyptic number.

201323304431 is a deficient number, since it is larger than the sum of its proper divisors (265949641).

201323304431 is an equidigital number, since it uses as much as digits as its factorization.

201323304431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265949640.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 201323304431 its reverse (134403323102), we get a palindrome (335726627533).

The spelling of 201323304431 in words is "two hundred one billion, three hundred twenty-three million, three hundred four thousand, four hundred thirty-one".