221225284153 has 8 divisors (see below), whose sum is σ = 234244319688. Its totient is φ = 208206891264.

The previous prime is 221225284123. The next prime is 221225284169. The reversal of 221225284153 is 351482522122.

It can be written as a sum of positive squares in 4 ways, for example, as 115472195344 + 105753088809 = 339812^2 + 325197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221225284153 - 2⁹ = 221225283641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221225284123) 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, 671175 + ... + 944947.

It is an arithmetic number, because the mean of its divisors is an integer number (29280539961).

Almost surely, 2^221225284153 is an apocalyptic number.

It is an amenable number.

221225284153 is a deficient number, since it is larger than the sum of its proper divisors (13019035535).

221225284153 is a wasteful number, since it uses less digits than its factorization.

221225284153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321323.

The product of its digits is 76800, while the sum is 37.

The spelling of 221225284153 in words is "two hundred twenty-one billion, two hundred twenty-five million, two hundred eighty-four thousand, one hundred fifty-three".