7213659315491 has 2 divisors, whose sum is σ = 7213659315492. Its totient is φ = 7213659315490.

The previous prime is 7213659315439. The next prime is 7213659315509. The reversal of 7213659315491 is 1945139563127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7213659315491 is a prime.

It is not a weakly prime, because it can be changed into another prime (7213659315431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606829657745 + 3606829657746.

It is an arithmetic number, because the mean of its divisors is an integer number (3606829657746).

Almost surely, 2^{7213659315491} is an apocalyptic number.

7213659315491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7213659315491 is an equidigital number, since it uses as much as digits as its factorization.

7213659315491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 56.

The spelling of 7213659315491 in words is "seven trillion, two hundred thirteen billion, six hundred fifty-nine million, three hundred fifteen thousand, four hundred ninety-one".