201431111444 has 6 divisors (see below), whose sum is σ = 352504445034. Its totient is φ = 100715555720.

The previous prime is 201431111443. The next prime is 201431111449. The reversal of 201431111444 is 444111134102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 151897267600 + 49533843844 = 389740^2 + 222562^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431111443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25178888927 + ... + 25178888934.

It is an arithmetic number, because the mean of its divisors is an integer number (58750740839).

Almost surely, 2^201431111444 is an apocalyptic number.

It is an amenable number.

201431111444 is a deficient number, since it is larger than the sum of its proper divisors (151073333590).

201431111444 is a wasteful number, since it uses less digits than its factorization.

201431111444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50357777865 (or 50357777863 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 201431111444 its reverse (444111134102), we get a palindrome (645542245546).

The spelling of 201431111444 in words is "two hundred one billion, four hundred thirty-one million, one hundred eleven thousand, four hundred forty-four".