2143156577 has 2 divisors, whose sum is σ = 2143156578. Its totient is φ = 2143156576.

The previous prime is 2143156567. The next prime is 2143156621. The reversal of 2143156577 is 7756513412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2130653281 + 12503296 = 46159^2 + 3536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143156577 is a prime.

It is a super-2 number, since 2×2143156577² = 9186240227076713858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2143156517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071578288 + 1071578289.

It is an arithmetic number, because the mean of its divisors is an integer number (1071578289).

Almost surely, 2^2143156577 is an apocalyptic number.

It is an amenable number.

2143156577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143156577 is an equidigital number, since it uses as much as digits as its factorization.

2143156577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 41.

The square root of 2143156577 is about 46294.2391340434. The cubic root of 2143156577 is about 1289.2920372709.

Adding to 2143156577 its reverse (7756513412), we get a palindrome (9899669989).

The spelling of 2143156577 in words is "two billion, one hundred forty-three million, one hundred fifty-six thousand, five hundred seventy-seven".