31444401311 has 2 divisors, whose sum is σ = 31444401312. Its totient is φ = 31444401310.

The previous prime is 31444401301. The next prime is 31444401319. The reversal of 31444401311 is 11310444413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31444401311 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31444401319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15722200655 + 15722200656.

It is an arithmetic number, because the mean of its divisors is an integer number (15722200656).

Almost surely, 2^31444401311 is an apocalyptic number.

31444401311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31444401311 is an equidigital number, since it uses as much as digits as its factorization.

31444401311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 31444401311 its reverse (11310444413), we get a palindrome (42754845724).

The spelling of 31444401311 in words is "thirty-one billion, four hundred forty-four million, four hundred one thousand, three hundred eleven".