31030143360661 has 2 divisors, whose sum is σ = 31030143360662. Its totient is φ = 31030143360660.

The previous prime is 31030143360631. The next prime is 31030143360677. The reversal of 31030143360661 is 16606334103013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25377665640625 + 5652477720036 = 5037625^2 + 2377494^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030143360661 - 2²¹ = 31030141263509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31030143360661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31030143360631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515071680330 + 15515071680331.

It is an arithmetic number, because the mean of its divisors is an integer number (15515071680331).

Almost surely, 2^{31030143360661} is an apocalyptic number.

It is an amenable number.

31030143360661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030143360661 is an equidigital number, since it uses as much as digits as its factorization.

31030143360661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 37.

Adding to 31030143360661 its reverse (16606334103013), we get a palindrome (47636477463674).

The spelling of 31030143360661 in words is "thirty-one trillion, thirty billion, one hundred forty-three million, three hundred sixty thousand, six hundred sixty-one".