72217125242 has 16 divisors (see below), whose sum is σ = 113170581000. Its totient is φ = 34518254400.

The previous prime is 72217125223. The next prime is 72217125263. The reversal of 72217125242 is 24252171227.

It can be written as a sum of positive squares in 4 ways, for example, as 67558926241 + 4658199001 = 259921^2 + 68251^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6158117 + ... + 6169832.

Almost surely, 2^72217125242 is an apocalyptic number.

72217125242 is a deficient number, since it is larger than the sum of its proper divisors (40953455758).

72217125242 is a wasteful number, since it uses less digits than its factorization.

72217125242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12328081.

The product of its digits is 31360, while the sum is 35.

Adding to 72217125242 its reverse (24252171227), we get a palindrome (96469296469).

The spelling of 72217125242 in words is "seventy-two billion, two hundred seventeen million, one hundred twenty-five thousand, two hundred forty-two".