1155523423 has 16 divisors (see below), whose sum is σ = 1182532032. Its totient is φ = 1128960000.

The previous prime is 1155523417. The next prime is 1155523471. The reversal of 1155523423 is 3243255511.

It is a cyclic number.

It is not a de Polignac number, because 1155523423 - 2⁹ = 1155522911 is a prime.

It is a super-2 number, since 2×1155523423² = 2670468762203273858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155523403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4112043 + ... + 4112323.

It is an arithmetic number, because the mean of its divisors is an integer number (73908252).

Almost surely, 2^1155523423 is an apocalyptic number.

1155523423 is a deficient number, since it is larger than the sum of its proper divisors (27008609).

1155523423 is a wasteful number, since it uses less digits than its factorization.

1155523423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its digits is 18000, while the sum is 31.

The square root of 1155523423 is about 33992.9907922207. The cubic root of 1155523423 is about 1049.3642176770.

Adding to 1155523423 its reverse (3243255511), we get a palindrome (4398778934).

The spelling of 1155523423 in words is "one billion, one hundred fifty-five million, five hundred twenty-three thousand, four hundred twenty-three".