1223280081 has 6 divisors (see below), whose sum is σ = 1766960130. Its totient is φ = 815520048.

The previous prime is 1223280061. The next prime is 1223280083. The reversal of 1223280081 is 1800823221.

It can be written as a sum of positive squares in only one way, i.e., 965966400 + 257313681 = 31080^2 + 16041^2 .

It is not a de Polignac number, because 1223280081 - 2⁹ = 1223279569 is a prime.

It is a super-2 number, since 2×1223280081² = 2992828313142733122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1223280083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67959996 + ... + 67960013.

It is an arithmetic number, because the mean of its divisors is an integer number (294493355).

Almost surely, 2^1223280081 is an apocalyptic number.

It is an amenable number.

1223280081 is a deficient number, since it is larger than the sum of its proper divisors (543680049).

1223280081 is a wasteful number, since it uses less digits than its factorization.

1223280081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135920015 (or 135920012 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1223280081 is about 34975.4210982513. The cubic root of 1223280081 is about 1069.4864863512.

The spelling of 1223280081 in words is "one billion, two hundred twenty-three million, two hundred eighty thousand, eighty-one".