221554136265145 has 32 divisors (see below), whose sum is σ = 280057189478400. Its totient is φ = 167795133352704.

The previous prime is 221554136265139. The next prime is 221554136265179. The reversal of 221554136265145 is 541562631455122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221554136265145 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221554136265092 and 221554136265101.

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 31 ways as a sum of consecutive naturals, for example, 1823895471 + ... + 1824016939.

It is an arithmetic number, because the mean of its divisors is an integer number (8751787171200).

Almost surely, 2^{221554136265145} is an apocalyptic number.

It is an amenable number.

221554136265145 is a deficient number, since it is larger than the sum of its proper divisors (58503053213255).

221554136265145 is a wasteful number, since it uses less digits than its factorization.

221554136265145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135009.

The product of its digits is 8640000, while the sum is 52.

The spelling of 221554136265145 in words is "two hundred twenty-one trillion, five hundred fifty-four billion, one hundred thirty-six million, two hundred sixty-five thousand, one hundred forty-five".