221952465871 has 8 divisors (see below), whose sum is σ = 222283681488. Its totient is φ = 221621400000.

The previous prime is 221952465869. The next prime is 221952465883. The reversal of 221952465871 is 178564259122.

It is a happy number.

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 221952465871 - 2¹ = 221952465869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221952460871) 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, 3126571 + ... + 3196771.

It is an arithmetic number, because the mean of its divisors is an integer number (27785460186).

Almost surely, 2^221952465871 is an apocalyptic number.

221952465871 is a deficient number, since it is larger than the sum of its proper divisors (331215617).

221952465871 is an equidigital number, since it uses as much as digits as its factorization.

221952465871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74873.

The product of its digits is 2419200, while the sum is 52.

The spelling of 221952465871 in words is "two hundred twenty-one billion, nine hundred fifty-two million, four hundred sixty-five thousand, eight hundred seventy-one".