1131223626 has 72 divisors (see below), whose sum is σ = 2691826956. Its totient is φ = 341303040.

The previous prime is 1131223591. The next prime is 1131223627. The reversal of 1131223626 is 6263221311.

1131223626 is a `hidden beast` number, since 1 + 1 + 3 + 12 + 23 + 626 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 741200625 + 390023001 = 27225^2 + 19749^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1131223626.

It is not an unprimeable number, because it can be changed into a prime (1131223627) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 656446 + ... + 658166.

Almost surely, 2^1131223626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131223626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345913478).

1131223626 is an abundant number, since it is smaller than the sum of its proper divisors (1560603330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131223626 is a wasteful number, since it uses less digits than its factorization.

1131223626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848 (or 1792 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1131223626 is about 33633.6680426028. The cubic root of 1131223626 is about 1041.9562618334.

Adding to 1131223626 its reverse (6263221311), we get a palindrome (7394444937).

The spelling of 1131223626 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, six hundred twenty-six".