7221507857143 has 2 divisors, whose sum is σ = 7221507857144. Its totient is φ = 7221507857142.

The previous prime is 7221507857117. The next prime is 7221507857167. The reversal of 7221507857143 is 3417587051227.

It is a strong prime.

It is an emirp because it is prime and its reverse (3417587051227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7221507857143 is a prime.

It is a super-2 number, since 2×7221507857143² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221507827143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610753928571 + 3610753928572.

It is an arithmetic number, because the mean of its divisors is an integer number (3610753928572).

Almost surely, 2^{7221507857143} is an apocalyptic number.

7221507857143 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221507857143 is an equidigital number, since it uses as much as digits as its factorization.

7221507857143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 7221507857143 in words is "seven trillion, two hundred twenty-one billion, five hundred seven million, eight hundred fifty-seven thousand, one hundred forty-three".