221086749239 has 4 divisors (see below), whose sum is σ = 227062066824. Its totient is φ = 215111431656.

The previous prime is 221086749187. The next prime is 221086749253. The reversal of 221086749239 is 932947680122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221086749239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221086749269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2987658737 + ... + 2987658810.

It is an arithmetic number, because the mean of its divisors is an integer number (56765516706).

Almost surely, 2^221086749239 is an apocalyptic number.

221086749239 is a deficient number, since it is larger than the sum of its proper divisors (5975317585).

221086749239 is an equidigital number, since it uses as much as digits as its factorization.

221086749239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975317584.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 221086749239 in words is "two hundred twenty-one billion, eighty-six million, seven hundred forty-nine thousand, two hundred thirty-nine".