7181631013 has 2 divisors, whose sum is σ = 7181631014. Its totient is φ = 7181631012.

The previous prime is 7181630993. The next prime is 7181631073. The reversal of 7181631013 is 3101361817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7119646884 + 61984129 = 84378^2 + 7873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7181631013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7181631073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590815506 + 3590815507.

It is an arithmetic number, because the mean of its divisors is an integer number (3590815507).

Almost surely, 2^7181631013 is an apocalyptic number.

It is an amenable number.

7181631013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181631013 is an equidigital number, since it uses as much as digits as its factorization.

7181631013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 7181631013 is about 84744.5043232893. The cubic root of 7181631013 is about 1929.3352353641.

The spelling of 7181631013 in words is "seven billion, one hundred eighty-one million, six hundred thirty-one thousand, thirteen".