3131440242661 has 2 divisors, whose sum is σ = 3131440242662. Its totient is φ = 3131440242660.

The previous prime is 3131440242653. The next prime is 3131440242677. The reversal of 3131440242661 is 1662420441313.

3131440242661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2728050125761 + 403390116900 = 1651681^2 + 635130^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131440242661 - 2³ = 3131440242653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3131440242661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131440242461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565720121330 + 1565720121331.

It is an arithmetic number, because the mean of its divisors is an integer number (1565720121331).

Almost surely, 2^{3131440242661} is an apocalyptic number.

It is an amenable number.

3131440242661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131440242661 is an equidigital number, since it uses as much as digits as its factorization.

3131440242661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 3131440242661 its reverse (1662420441313), we get a palindrome (4793860683974).

The spelling of 3131440242661 in words is "three trillion, one hundred thirty-one billion, four hundred forty million, two hundred forty-two thousand, six hundred sixty-one".