61631425022213 has 2 divisors, whose sum is σ = 61631425022214. Its totient is φ = 61631425022212.

The previous prime is 61631425022149. The next prime is 61631425022261. The reversal of 61631425022213 is 31222052413616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61008940315684 + 622484706529 = 7810822^2 + 788977^2 .

It is a cyclic number.

It is not a de Polignac number, because 61631425022213 - 2⁶ = 61631425022149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61631425022513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30815712511106 + 30815712511107.

It is an arithmetic number, because the mean of its divisors is an integer number (30815712511107).

Almost surely, 2^{61631425022213} is an apocalyptic number.

It is an amenable number.

61631425022213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61631425022213 is an equidigital number, since it uses as much as digits as its factorization.

61631425022213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 61631425022213 its reverse (31222052413616), we get a palindrome (92853477435829).

The spelling of 61631425022213 in words is "sixty-one trillion, six hundred thirty-one billion, four hundred twenty-five million, twenty-two thousand, two hundred thirteen".