221664016043 has 8 divisors (see below), whose sum is σ = 222592715712. Its totient is φ = 220735830016.

The previous prime is 221664016037. The next prime is 221664016051. The reversal of 221664016043 is 340610466122.

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 221664016043 - 2²⁸ = 221395580587 is a prime.

It is a super-2 number, since 2×221664016043² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221664015994 and 221664016012.

It is not an unprimeable number, because it can be changed into a prime (221664016843) 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, 749021 + ... + 1002177.

It is an arithmetic number, because the mean of its divisors is an integer number (27824089464).

Almost surely, 2^221664016043 is an apocalyptic number.

221664016043 is a deficient number, since it is larger than the sum of its proper divisors (928699669).

221664016043 is a wasteful number, since it uses less digits than its factorization.

221664016043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256821.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 221664016043 in words is "two hundred twenty-one billion, six hundred sixty-four million, sixteen thousand, forty-three".