221160187231 has 4 divisors (see below), whose sum is σ = 221169715000. Its totient is φ = 221150659464.

The previous prime is 221160187229. The next prime is 221160187247. The reversal of 221160187231 is 132781061122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221160187231 - 2¹ = 221160187229 is a prime.

It is a super-2 number, since 2×221160187231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221160187211) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4728981 + ... + 4775518.

It is an arithmetic number, because the mean of its divisors is an integer number (55292428750).

Almost surely, 2^221160187231 is an apocalyptic number.

221160187231 is a deficient number, since it is larger than the sum of its proper divisors (9527769).

221160187231 is an equidigital number, since it uses as much as digits as its factorization.

221160187231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527768.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 221160187231 in words is "two hundred twenty-one billion, one hundred sixty million, one hundred eighty-seven thousand, two hundred thirty-one".