2543430221018 has 4 divisors (see below), whose sum is σ = 3815145331530. Its totient is φ = 1271715110508.

The previous prime is 2543430220993. The next prime is 2543430221083. The reversal of 2543430221018 is 8101220343452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2148590161249 + 394840059769 = 1465807^2 + 628363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635857555253 + ... + 635857555256.

Almost surely, 2^{2543430221018} is an apocalyptic number.

2543430221018 is a deficient number, since it is larger than the sum of its proper divisors (1271715110512).

2543430221018 is a wasteful number, since it uses less digits than its factorization.

2543430221018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271715110511.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 2543430221018 in words is "two trillion, five hundred forty-three billion, four hundred thirty million, two hundred twenty-one thousand, eighteen".