2543154121 has 2 divisors, whose sum is σ = 2543154122. Its totient is φ = 2543154120.

The previous prime is 2543154077. The next prime is 2543154127. The reversal of 2543154121 is 1214513452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1622881225 + 920272896 = 40285^2 + 30336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543154121 - 2⁷ = 2543153993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2543154121.

It is not a weakly prime, because it can be changed into another prime (2543154127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271577060 + 1271577061.

It is an arithmetic number, because the mean of its divisors is an integer number (1271577061).

Almost surely, 2^2543154121 is an apocalyptic number.

It is an amenable number.

2543154121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543154121 is an equidigital number, since it uses as much as digits as its factorization.

2543154121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 28.

The square root of 2543154121 is about 50429.6948335006. The cubic root of 2543154121 is about 1364.9735213816.

Adding to 2543154121 its reverse (1214513452), we get a palindrome (3757667573).

The spelling of 2543154121 in words is "two billion, five hundred forty-three million, one hundred fifty-four thousand, one hundred twenty-one".