7212519913 has 2 divisors, whose sum is σ = 7212519914. Its totient is φ = 7212519912.

The previous prime is 7212519901. The next prime is 7212519953. The reversal of 7212519913 is 3199152127.

It is an a-pointer prime, because the next prime (7212519953) can be obtained adding 7212519913 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5783906704 + 1428613209 = 76052^2 + 37797^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212519913 - 2⁹ = 7212519401 is a prime.

It is not a weakly prime, because it can be changed into another prime (7212519953) 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, 3606259956 + 3606259957.

It is an arithmetic number, because the mean of its divisors is an integer number (3606259957).

Almost surely, 2^7212519913 is an apocalyptic number.

It is an amenable number.

7212519913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212519913 is an equidigital number, since it uses as much as digits as its factorization.

7212519913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 7212519913 is about 84926.5559939881. Note that the first 3 decimals coincide. The cubic root of 7212519913 is about 1932.0973658256.

The spelling of 7212519913 in words is "seven billion, two hundred twelve million, five hundred nineteen thousand, nine hundred thirteen".