221533606272564 has 36 divisors (see below), whose sum is σ = 560106797717376. Its totient is φ = 73828833786768.

The previous prime is 221533606272557. The next prime is 221533606272613. The reversal of 221533606272564 is 465272606335122.

221533606272564 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 3 + 3 + 6 + 0 + 6 + 2 + 72 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 221533606272564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654063234 + ... + 654401849.

It is an arithmetic number, because the mean of its divisors is an integer number (15558522158816).

Almost surely, 2^{221533606272564} is an apocalyptic number.

It is an amenable number.

221533606272564 is an abundant number, since it is smaller than the sum of its proper divisors (338573191444812).

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

221533606272564 is a wasteful number, since it uses less digits than its factorization.

221533606272564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308469796 (or 1308469791 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 54.

The spelling of 221533606272564 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred six million, two hundred seventy-two thousand, five hundred sixty-four".