221716167516556 has 48 divisors (see below), whose sum is σ = 392254439415552. Its totient is φ = 109646824593600.

The previous prime is 221716167516433. The next prime is 221716167516581. The reversal of 221716167516556 is 655615761617122.

It is a happy number.

It is a super-2 number, since 2×221716167516556² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221716167516494 and 221716167516503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131403826 + ... + 2131507846.

It is an arithmetic number, because the mean of its divisors is an integer number (8171967487824).

Almost surely, 2^{221716167516556} is an apocalyptic number.

It is an amenable number.

221716167516556 is a deficient number, since it is larger than the sum of its proper divisors (170538271898996).

221716167516556 is a wasteful number, since it uses less digits than its factorization.

221716167516556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112030 (or 112028 counting only the distinct ones).

The product of its digits is 31752000, while the sum is 61.

The spelling of 221716167516556 in words is "two hundred twenty-one trillion, seven hundred sixteen billion, one hundred sixty-seven million, five hundred sixteen thousand, five hundred fifty-six".