70321522115521 has 8 divisors (see below), whose sum is σ = 73023004486080. Its totient is φ = 67638479898192.

The previous prime is 70321522115503. The next prime is 70321522115617. The reversal of 70321522115521 is 12551122512307.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70321522115521 - 2¹⁷ = 70321521984449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70321522115321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4610030535 + ... + 4610045788.

It is an arithmetic number, because the mean of its divisors is an integer number (9127875560760).

Almost surely, 2^{70321522115521} is an apocalyptic number.

It is an amenable number.

70321522115521 is a deficient number, since it is larger than the sum of its proper divisors (2701482370559).

70321522115521 is a wasteful number, since it uses less digits than its factorization.

70321522115521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220076615.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 70321522115521 its reverse (12551122512307), we get a palindrome (82872644627828).

The spelling of 70321522115521 in words is "seventy trillion, three hundred twenty-one billion, five hundred twenty-two million, one hundred fifteen thousand, five hundred twenty-one".