215245420140242 has 32 divisors (see below), whose sum is σ = 330021996668928. Its totient is φ = 105258578040000.

The previous prime is 215245420140197. The next prime is 215245420140271. The reversal of 215245420140242 is 242041024542512.

It is a junction number, because it is equal to n+sod(n) for n = 215245420140196 and 215245420140205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51852392 + ... + 55849452.

It is an arithmetic number, because the mean of its divisors is an integer number (10313187395904).

Almost surely, 2^{215245420140242} is an apocalyptic number.

215245420140242 is a deficient number, since it is larger than the sum of its proper divisors (114776576528686).

215245420140242 is a wasteful number, since it uses less digits than its factorization.

215245420140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999626.

The product of its (nonzero) digits is 204800, while the sum is 38.

Adding to 215245420140242 its reverse (242041024542512), we get a palindrome (457286444682754).

The spelling of 215245420140242 in words is "two hundred fifteen trillion, two hundred forty-five billion, four hundred twenty million, one hundred forty thousand, two hundred forty-two".