221465517393 has 8 divisors (see below), whose sum is σ = 295335016000. Its totient is φ = 147619848528.

The previous prime is 221465517293. The next prime is 221465517407. The reversal of 221465517393 is 393715564122.

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

It is not a de Polignac number, because 221465517393 - 2¹⁰ = 221465516369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221465517293) 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, 5935738 + ... + 5972931.

It is an arithmetic number, because the mean of its divisors is an integer number (36916877000).

Almost surely, 2^221465517393 is an apocalyptic number.

It is an amenable number.

221465517393 is a deficient number, since it is larger than the sum of its proper divisors (73869498607).

221465517393 is a wasteful number, since it uses less digits than its factorization.

221465517393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11914871.

The product of its digits is 1360800, while the sum is 48.

The spelling of 221465517393 in words is "two hundred twenty-one billion, four hundred sixty-five million, five hundred seventeen thousand, three hundred ninety-three".