201431311 has 2 divisors, whose sum is σ = 201431312. Its totient is φ = 201431310.

The previous prime is 201431287. The next prime is 201431327. The reversal of 201431311 is 113134102.

It is an a-pointer prime, because the next prime (201431327) can be obtained adding 201431311 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201431311 - 2¹⁵ = 201398543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201431341) 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 as a sum of consecutive naturals, namely, 100715655 + 100715656.

It is an arithmetic number, because the mean of its divisors is an integer number (100715656).

Almost surely, 2^201431311 is an apocalyptic number.

201431311 is a deficient number, since it is larger than the sum of its proper divisors (1).

201431311 is an equidigital number, since it uses as much as digits as its factorization.

201431311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 201431311 is about 14192.6498935188. The cubic root of 201431311 is about 586.1952924553.

Adding to 201431311 its reverse (113134102), we get a palindrome (314565413).

The spelling of 201431311 in words is "two hundred one million, four hundred thirty-one thousand, three hundred eleven".