7857221507143 has 2 divisors, whose sum is σ = 7857221507144. Its totient is φ = 7857221507142.

The previous prime is 7857221507119. The next prime is 7857221507153. The reversal of 7857221507143 is 3417051227587.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7857221507143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7857221507153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928610753571 + 3928610753572.

It is an arithmetic number, because the mean of its divisors is an integer number (3928610753572).

Almost surely, 2^{7857221507143} is an apocalyptic number.

7857221507143 is a deficient number, since it is larger than the sum of its proper divisors (1).

7857221507143 is an equidigital number, since it uses as much as digits as its factorization.

7857221507143 is an evil number, because the sum of its binary digits is even.

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

The spelling of 7857221507143 in words is "seven trillion, eight hundred fifty-seven billion, two hundred twenty-one million, five hundred seven thousand, one hundred forty-three".