1165612223 has 16 divisors (see below), whose sum is σ = 1207320576. Its totient is φ = 1124655840.

The previous prime is 1165612219. The next prime is 1165612241. The reversal of 1165612223 is 3222165611.

It is a cyclic number.

It is not a de Polignac number, because 1165612223 - 2² = 1165612219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165612213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517290 + ... + 2517752.

It is an arithmetic number, because the mean of its divisors is an integer number (75457536).

Almost surely, 2^1165612223 is an apocalyptic number.

1165612223 is a deficient number, since it is larger than the sum of its proper divisors (41708353).

1165612223 is a wasteful number, since it uses less digits than its factorization.

1165612223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its digits is 4320, while the sum is 29.

The square root of 1165612223 is about 34141.0635891737. The cubic root of 1165612223 is about 1052.4093494707.

Adding to 1165612223 its reverse (3222165611), we get a palindrome (4387777834).

The spelling of 1165612223 in words is "one billion, one hundred sixty-five million, six hundred twelve thousand, two hundred twenty-three".