2043242043257 has 2 divisors, whose sum is σ = 2043242043258. Its totient is φ = 2043242043256.

The previous prime is 2043242043229. The next prime is 2043242043329. The reversal of 2043242043257 is 7523402423402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2023162019641 + 20080023616 = 1422379^2 + 141704^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043242043257 - 2¹² = 2043242039161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2043242043257.

It is not a weakly prime, because it can be changed into another prime (2043242093257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021621021628 + 1021621021629.

It is an arithmetic number, because the mean of its divisors is an integer number (1021621021629).

Almost surely, 2^{2043242043257} is an apocalyptic number.

It is an amenable number.

2043242043257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043242043257 is an equidigital number, since it uses as much as digits as its factorization.

2043242043257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 38.

Adding to 2043242043257 its reverse (7523402423402), we get a palindrome (9566644466659).

The spelling of 2043242043257 in words is "two trillion, forty-three billion, two hundred forty-two million, forty-three thousand, two hundred fifty-seven".