221140231615 has 8 divisors (see below), whose sum is σ = 265378780368. Its totient is φ = 176905183680.

The previous prime is 221140231607. The next prime is 221140231649. The reversal of 221140231615 is 516132041122.

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

It is not a de Polignac number, because 221140231615 - 2³ = 221140231607 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 734166 + ... + 990595.

It is an arithmetic number, because the mean of its divisors is an integer number (33172347546).

Almost surely, 2^221140231615 is an apocalyptic number.

221140231615 is a deficient number, since it is larger than the sum of its proper divisors (44238548753).

221140231615 is a wasteful number, since it uses less digits than its factorization.

221140231615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750409.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 221140231615 its reverse (516132041122), we get a palindrome (737272272737).

The spelling of 221140231615 in words is "two hundred twenty-one billion, one hundred forty million, two hundred thirty-one thousand, six hundred fifteen".