27812308221 has 48 divisors (see below), whose sum is σ = 41857845120. Its totient is φ = 17781120000.

The previous prime is 27812308211. The next prime is 27812308229. The reversal of 27812308221 is 12280321872.

It is not a de Polignac number, because 27812308221 - 2⁷ = 27812308093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27812308229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9928021 + ... + 9930821.

It is an arithmetic number, because the mean of its divisors is an integer number (872038440).

Almost surely, 2^27812308221 is an apocalyptic number.

It is an amenable number.

27812308221 is a deficient number, since it is larger than the sum of its proper divisors (14045536899).

27812308221 is a wasteful number, since it uses less digits than its factorization.

27812308221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 27812308221 in words is "twenty-seven billion, eight hundred twelve million, three hundred eight thousand, two hundred twenty-one".