2542343521 has 2 divisors, whose sum is σ = 2542343522. Its totient is φ = 2542343520.

The previous prime is 2542343513. The next prime is 2542343527. The reversal of 2542343521 is 1253432452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2290962496 + 251381025 = 47864^2 + 15855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542343521 - 2³ = 2542343513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2542343527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271171760 + 1271171761.

It is an arithmetic number, because the mean of its divisors is an integer number (1271171761).

Almost surely, 2^2542343521 is an apocalyptic number.

It is an amenable number.

2542343521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542343521 is an equidigital number, since it uses as much as digits as its factorization.

2542343521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 31.

The square root of 2542343521 is about 50421.6572615379. The cubic root of 2542343521 is about 1364.8284829687.

Adding to 2542343521 its reverse (1253432452), we get a palindrome (3795775973).

The spelling of 2542343521 in words is "two billion, five hundred forty-two million, three hundred forty-three thousand, five hundred twenty-one".