1151323223 has 4 divisors (see below), whose sum is σ = 1167094848. Its totient is φ = 1135551600.

The previous prime is 1151323189. The next prime is 1151323241. The reversal of 1151323223 is 3223231511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1151323223 - 2²⁸ = 882887767 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 (1151323253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7885703 + ... + 7885848.

It is an arithmetic number, because the mean of its divisors is an integer number (291773712).

Almost surely, 2^1151323223 is an apocalyptic number.

1151323223 is a deficient number, since it is larger than the sum of its proper divisors (15771625).

1151323223 is an equidigital number, since it uses as much as digits as its factorization.

1151323223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15771624.

The product of its digits is 1080, while the sum is 23.

The square root of 1151323223 is about 33931.1541654569. The cubic root of 1151323223 is about 1048.0912330376.

Adding to 1151323223 its reverse (3223231511), we get a palindrome (4374554734).

The spelling of 1151323223 in words is "one billion, one hundred fifty-one million, three hundred twenty-three thousand, two hundred twenty-three".