27713253221 has 4 divisors (see below), whose sum is σ = 27852516000. Its totient is φ = 27573990444.

The previous prime is 27713253203. The next prime is 27713253257. The reversal of 27713253221 is 12235231772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27713253221 - 2¹⁰ = 27713252197 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 (27713253121) 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, 69631091 + ... + 69631488.

It is an arithmetic number, because the mean of its divisors is an integer number (6963129000).

Almost surely, 2^27713253221 is an apocalyptic number.

It is an amenable number.

27713253221 is a deficient number, since it is larger than the sum of its proper divisors (139262779).

27713253221 is a wasteful number, since it uses less digits than its factorization.

27713253221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139262778.

The product of its digits is 35280, while the sum is 35.

Adding to 27713253221 its reverse (12235231772), we get a palindrome (39948484993).

The spelling of 27713253221 in words is "twenty-seven billion, seven hundred thirteen million, two hundred fifty-three thousand, two hundred twenty-one".