221517221630590 has 32 divisors (see below), whose sum is σ = 400129101015840. Its totient is φ = 88296536469504.

The previous prime is 221517221630587. The next prime is 221517221630623. The reversal of 221517221630590 is 95036122715122.

It is a self number, because there is not a number n which added to its sum of digits gives 221517221630590.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15815944 + ... + 26328283.

It is an arithmetic number, because the mean of its divisors is an integer number (12504034406745).

Almost surely, 2^{221517221630590} is an apocalyptic number.

221517221630590 is a deficient number, since it is larger than the sum of its proper divisors (178611879385250).

221517221630590 is a wasteful number, since it uses less digits than its factorization.

221517221630590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42146076.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 221517221630590 in words is "two hundred twenty-one trillion, five hundred seventeen billion, two hundred twenty-one million, six hundred thirty thousand, five hundred ninety".