1223826165 has 40 divisors (see below), whose sum is σ = 2201943480. Its totient is φ = 650291328.

The previous prime is 1223826143. The next prime is 1223826169. The reversal of 1223826165 is 5616283221.

1223826165 is a `hidden beast` number, since 1 + 2 + 2 + 38 + 2 + 616 + 5 = 666.

1223826165 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 1223810289 = 126^2 + 34983^2 .

It is not a de Polignac number, because 1223826165 - 2⁶ = 1223826101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223826169) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 106731 + ... + 117639.

It is an arithmetic number, because the mean of its divisors is an integer number (55048587).

Almost surely, 2^1223826165 is an apocalyptic number.

1223826165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223826165 is a deficient number, since it is larger than the sum of its proper divisors (978117315).

1223826165 is a wasteful number, since it uses less digits than its factorization.

1223826165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203 (or 11194 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1223826165 is about 34983.2269094776. The cubic root of 1223826165 is about 1069.6456056958.

The spelling of 1223826165 in words is "one billion, two hundred twenty-three million, eight hundred twenty-six thousand, one hundred sixty-five".