215173505042 has 32 divisors (see below), whose sum is σ = 341560627200. Its totient is φ = 101381792400.

The previous prime is 215173504999. The next prime is 215173505077. The reversal of 215173505042 is 240505371512.

It is a junction number, because it is equal to n+sod(n) for n = 215173504993 and 215173505011.

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, 5641817 + ... + 5679827.

It is an arithmetic number, because the mean of its divisors is an integer number (10673769600).

Almost surely, 2^215173505042 is an apocalyptic number.

215173505042 is a deficient number, since it is larger than the sum of its proper divisors (126387122158).

215173505042 is a wasteful number, since it uses less digits than its factorization.

215173505042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38822.

The product of its (nonzero) digits is 42000, while the sum is 35.

Adding to 215173505042 its reverse (240505371512), we get a palindrome (455678876554).

The spelling of 215173505042 in words is "two hundred fifteen billion, one hundred seventy-three million, five hundred five thousand, forty-two".