1223328261 has 16 divisors (see below), whose sum is σ = 1652644800. Its totient is φ = 804835200.

The previous prime is 1223328259. The next prime is 1223328283. The reversal of 1223328261 is 1628233221.

It is not a de Polignac number, because 1223328261 - 2¹ = 1223328259 is a prime.

It is a super-2 number, since 2×1223328261² = 2993064068322568242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223328961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88390 + ... + 101288.

It is an arithmetic number, because the mean of its divisors is an integer number (103290300).

Almost surely, 2^1223328261 is an apocalyptic number.

It is an amenable number.

1223328261 is a deficient number, since it is larger than the sum of its proper divisors (429316539).

1223328261 is a wasteful number, since it uses less digits than its factorization.

1223328261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13316.

The product of its digits is 6912, while the sum is 30.

The square root of 1223328261 is about 34976.1098608750. The cubic root of 1223328261 is about 1069.5005270666.

The spelling of 1223328261 in words is "one billion, two hundred twenty-three million, three hundred twenty-eight thousand, two hundred sixty-one".