31142444413 has 2 divisors, whose sum is σ = 31142444414. Its totient is φ = 31142444412.

The previous prime is 31142444407. The next prime is 31142444467. The reversal of 31142444413 is 31444424113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29571273369 + 1571171044 = 171963^2 + 39638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31142444413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31142441413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571222206 + 15571222207.

It is an arithmetic number, because the mean of its divisors is an integer number (15571222207).

Almost surely, 2^31142444413 is an apocalyptic number.

It is an amenable number.

31142444413 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142444413 is an equidigital number, since it uses as much as digits as its factorization.

31142444413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 31.

Adding to 31142444413 its reverse (31444424113), we get a palindrome (62586868526).

The spelling of 31142444413 in words is "thirty-one billion, one hundred forty-two million, four hundred forty-four thousand, four hundred thirteen".