221525224145156 has 24 divisors (see below), whose sum is σ = 404525586212160. Its totient is φ = 105946515319392.

The previous prime is 221525224145117. The next prime is 221525224145213. The reversal of 221525224145156 is 651541422525122.

It is a self number, because there is not a number n which added to its sum of digits gives 221525224145156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27224810 + ... + 34412798.

It is an arithmetic number, because the mean of its divisors is an integer number (16855232758840).

Almost surely, 2^{221525224145156} is an apocalyptic number.

It is an amenable number.

221525224145156 is a deficient number, since it is larger than the sum of its proper divisors (183000362067004).

221525224145156 is a wasteful number, since it uses less digits than its factorization.

221525224145156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523003 (or 7523001 counting only the distinct ones).

The product of its digits is 1920000, while the sum is 47.

The spelling of 221525224145156 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, two hundred twenty-four million, one hundred forty-five thousand, one hundred fifty-six".