201431323 has 4 divisors (see below), whose sum is σ = 205231968. Its totient is φ = 197630680.

The previous prime is 201431311. The next prime is 201431327. The reversal of 201431323 is 323134102.

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 201431323 - 2²¹ = 199334171 is a prime.

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 201431323.

It is not an unprimeable number, because it can be changed into a prime (201431327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900243 + ... + 1900348.

It is an arithmetic number, because the mean of its divisors is an integer number (51307992).

Almost surely, 2^201431323 is an apocalyptic number.

201431323 is a deficient number, since it is larger than the sum of its proper divisors (3800645).

201431323 is an equidigital number, since it uses as much as digits as its factorization.

201431323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800644.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 201431323 is about 14192.6503162729. The cubic root of 201431323 is about 586.1953040959.

Adding to 201431323 its reverse (323134102), we get a palindrome (524565425).

The spelling of 201431323 in words is "two hundred one million, four hundred thirty-one thousand, three hundred twenty-three".