215311343411242 has 48 divisors (see below), whose sum is σ = 358402628041920. Its totient is φ = 96909793718400.

The previous prime is 215311343411189. The next prime is 215311343411257. The reversal of 215311343411242 is 242114343113512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29580859 + ... + 36133777.

It is an arithmetic number, because the mean of its divisors is an integer number (7466721417540).

Almost surely, 2^{215311343411242} is an apocalyptic number.

215311343411242 is a deficient number, since it is larger than the sum of its proper divisors (143091284630678).

215311343411242 is a wasteful number, since it uses less digits than its factorization.

215311343411242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555359 (or 6555346 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

Adding to 215311343411242 its reverse (242114343113512), we get a palindrome (457425686524754).

The spelling of 215311343411242 in words is "two hundred fifteen trillion, three hundred eleven billion, three hundred forty-three million, four hundred eleven thousand, two hundred forty-two".