221708053684 has 24 divisors (see below), whose sum is σ = 417848279688. Its totient is φ = 102323397120.

The previous prime is 221708053667. The next prime is 221708053687. The reversal of 221708053684 is 486350807122.

221708053684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2168951184 + 219539102500 = 46572^2 + 468550^2 .

It is a super-2 number, since 2×221708053684² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221708053687) 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, 2211984 + ... + 2310040.

It is an arithmetic number, because the mean of its divisors is an integer number (17410344987).

Almost surely, 2^221708053684 is an apocalyptic number.

It is an amenable number.

221708053684 is a deficient number, since it is larger than the sum of its proper divisors (196140226004).

221708053684 is a wasteful number, since it uses less digits than its factorization.

221708053684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141555 (or 141553 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 221708053684 in words is "two hundred twenty-one billion, seven hundred eight million, fifty-three thousand, six hundred eighty-four".