1145422231 has 4 divisors (see below), whose sum is σ = 1152718072. Its totient is φ = 1138126392.

The previous prime is 1145422217. The next prime is 1145422247. The reversal of 1145422231 is 1322245411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1322245411 = 1153 ⋅1146787.

It is a cyclic number.

It is not a de Polignac number, because 1145422231 - 2⁵ = 1145422199 is a prime.

It is a super-2 number, since 2×1145422231² = 2623984174538034722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145422196 and 1145422205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145420231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3647685 + ... + 3647998.

It is an arithmetic number, because the mean of its divisors is an integer number (288179518).

Almost surely, 2^1145422231 is an apocalyptic number.

1145422231 is a deficient number, since it is larger than the sum of its proper divisors (7295841).

1145422231 is an equidigital number, since it uses as much as digits as its factorization.

1145422231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295840.

The product of its digits is 1920, while the sum is 25.

The square root of 1145422231 is about 33844.0870906574. The cubic root of 1145422231 is about 1046.2975361459.

Adding to 1145422231 its reverse (1322245411), we get a palindrome (2467667642).

The spelling of 1145422231 in words is "one billion, one hundred forty-five million, four hundred twenty-two thousand, two hundred thirty-one".