1027808221 has 4 divisors (see below), whose sum is σ = 1121245344. Its totient is φ = 934371100.

The previous prime is 1027808209. The next prime is 1027808239. The reversal of 1027808221 is 1228087201.

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 1027808221 - 2¹⁵ = 1027775453 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027808251) 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, 46718545 + ... + 46718566.

It is an arithmetic number, because the mean of its divisors is an integer number (280311336).

Almost surely, 2^1027808221 is an apocalyptic number.

1027808221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1027808221 is a deficient number, since it is larger than the sum of its proper divisors (93437123).

1027808221 is an equidigital number, since it uses as much as digits as its factorization.

1027808221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93437122.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 1027808221 is about 32059.4482329313. The cubic root of 1027808221 is about 1009.1847883850.

The spelling of 1027808221 in words is "one billion, twenty-seven million, eight hundred eight thousand, two hundred twenty-one".