223571820672 has 72 divisors (see below), whose sum is σ = 643397387295. Its totient is φ = 74518590720.

The previous prime is 223571820653. The next prime is 223571820691. The reversal of 223571820672 is 276028175322.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

223571820672 is a `hidden beast` number, since 2 + 2 + 3 + 571 + 8 + 2 + 0 + 6 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (223571820653) and next prime (223571820691).

It can be written as a sum of positive squares in only one way, i.e., 111785910336 + 111785910336 = 334344^2 + 334344^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334344.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16041547 + ... + 16055477.

Almost surely, 2^223571820672 is an apocalyptic number.

It is an amenable number.

223571820672 is an abundant number, since it is smaller than the sum of its proper divisors (419825566623).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223571820672 is an frugal number, since it uses more digits than its factorization.

223571820672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27882 (or 13936 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

Adding to 223571820672 its reverse (276028175322), we get a palindrome (499599995994).

The spelling of 223571820672 in words is "two hundred twenty-three billion, five hundred seventy-one million, eight hundred twenty thousand, six hundred seventy-two".