31044211381 has 2 divisors, whose sum is σ = 31044211382. Its totient is φ = 31044211380.

The previous prime is 31044211277. The next prime is 31044211469. The reversal of 31044211381 is 18311244013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30390948900 + 653262481 = 174330^2 + 25559^2 .

It is a cyclic number.

It is not a de Polignac number, because 31044211381 - 2¹⁹ = 31043687093 is a prime.

It is a super-2 number, since 2×31044211381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31044211481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15522105690 + 15522105691.

It is an arithmetic number, because the mean of its divisors is an integer number (15522105691).

Almost surely, 2^31044211381 is an apocalyptic number.

It is an amenable number.

31044211381 is a deficient number, since it is larger than the sum of its proper divisors (1).

31044211381 is an equidigital number, since it uses as much as digits as its factorization.

31044211381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 31044211381 its reverse (18311244013), we get a palindrome (49355455394).

The spelling of 31044211381 in words is "thirty-one billion, forty-four million, two hundred eleven thousand, three hundred eighty-one".