221526561352552 has 64 divisors (see below), whose sum is σ = 437938284470400. Its totient is φ = 104843632988160.

The previous prime is 221526561352543. The next prime is 221526561352559. The reversal of 221526561352552 is 255253165625122.

It is a self number, because there is not a number n which added to its sum of digits gives 221526561352552.

It is not an unprimeable number, because it can be changed into a prime (221526561352559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161573524 + ... + 162938812.

It is an arithmetic number, because the mean of its divisors is an integer number (6842785694850).

Almost surely, 2^{221526561352552} is an apocalyptic number.

It is an amenable number.

221526561352552 is a deficient number, since it is larger than the sum of its proper divisors (216411723117848).

221526561352552 is a wasteful number, since it uses less digits than its factorization.

221526561352552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374506 (or 1374502 counting only the distinct ones).

The product of its digits is 10800000, while the sum is 52.

The spelling of 221526561352552 in words is "two hundred twenty-one trillion, five hundred twenty-six billion, five hundred sixty-one million, three hundred fifty-two thousand, five hundred fifty-two".